1651645545 has 32 divisors (see below), whose sum is σ = 2888555904. Its totient is φ = 799219200.

The previous prime is 1651645529. The next prime is 1651645549. The reversal of 1651645545 is 5455461561.

It is not a de Polignac number, because 1651645545 - 2⁴ = 1651645529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1651645497 and 1651645506.

It is not an unprimeable number, because it can be changed into a prime (1651645549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76359 + ... + 95571.

It is an arithmetic number, because the mean of its divisors is an integer number (90267372).

Almost surely, 2^1651645545 is an apocalyptic number.

1651645545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1651645545 is a deficient number, since it is larger than the sum of its proper divisors (1236910359).

1651645545 is a wasteful number, since it uses less digits than its factorization.

1651645545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19753.

The product of its digits is 360000, while the sum is 42.

The square root of 1651645545 is about 40640.4422343065. The cubic root of 1651645545 is about 1182.0584450360.

The spelling of 1651645545 in words is "one billion, six hundred fifty-one million, six hundred forty-five thousand, five hundred forty-five".