1620126544 has 10 divisors (see below), whose sum is σ = 3138995210. Its totient is φ = 810063264.

The previous prime is 1620126533. The next prime is 1620126577. The reversal of 1620126544 is 4456210261.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1157360400 + 462766144 = 34020^2 + 21512^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50628939 + ... + 50628970.

It is an arithmetic number, because the mean of its divisors is an integer number (313899521).

Almost surely, 2^1620126544 is an apocalyptic number.

It is an amenable number.

1620126544 is a deficient number, since it is larger than the sum of its proper divisors (1518868666).

1620126544 is a wasteful number, since it uses less digits than its factorization.

1620126544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101257917 (or 101257911 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 1620126544 is about 40250.7955697773. The cubic root of 1620126544 is about 1174.4908719872.

It can be divided in two parts, 1620 and 126544, that added together give a square (128164 = 358²).

The spelling of 1620126544 in words is "one billion, six hundred twenty million, one hundred twenty-six thousand, five hundred forty-four".