1903160961601 has 9 divisors (see below), whose sum is σ = 1921262758051. Its totient is φ = 1885228178152.

The previous prime is 1903160961593. The next prime is 1903160961607. The reversal of 1903160961601 is 1061690613091.

The square root of 1903160961601 is 1379551.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1146045186225 + 757115775376 = 1070535^2 + 870124^2 .

It is not a de Polignac number, because 1903160961601 - 2³ = 1903160961593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1903160961607) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 147605511 + ... + 147618403.

Almost surely, 2^{1903160961601} is an apocalyptic number.

1903160961601 is the 1379551-st square number.

1903160961601 is the 689776-th centered octagonal number.

It is an amenable number.

1903160961601 is a deficient number, since it is larger than the sum of its proper divisors (18101796450).

1903160961601 is an frugal number, since it uses more digits than its factorization.

1903160961601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26000 (or 13000 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 43.

The spelling of 1903160961601 in words is "one trillion, nine hundred three billion, one hundred sixty million, nine hundred sixty-one thousand, six hundred one".