9945257537 has 16 divisors (see below), whose sum is σ = 10446891840. Its totient is φ = 9456921600.

The previous prime is 9945257521. The next prime is 9945257551. The reversal of 9945257537 is 7357525499.

It is a cyclic number.

It is not a de Polignac number, because 9945257537 - 2⁴ = 9945257521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9945257507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 859889 + ... + 871377.

It is an arithmetic number, because the mean of its divisors is an integer number (652930740).

Almost surely, 2^9945257537 is an apocalyptic number.

It is an amenable number.

9945257537 is a deficient number, since it is larger than the sum of its proper divisors (501634303).

9945257537 is a wasteful number, since it uses less digits than its factorization.

9945257537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12064.

The product of its digits is 11907000, while the sum is 56.

The square root of 9945257537 is about 99725.9120640167. The cubic root of 9945257537 is about 2150.4961924531.

The spelling of 9945257537 in words is "nine billion, nine hundred forty-five million, two hundred fifty-seven thousand, five hundred thirty-seven".