39645494757 has 24 divisors (see below), whose sum is σ = 62988002688. Its totient is φ = 24027565320.

The previous prime is 39645494717. The next prime is 39645494761. The reversal of 39645494757 is 75749454693.

39645494757 is a `hidden beast` number, since 3 + 96 + 4 + 5 + 494 + 7 + 57 = 666.

It is not a de Polignac number, because 39645494757 - 2¹¹ = 39645492709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 39645494694 and 39645494703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39645494717) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1642813 + ... + 1666770.

It is an arithmetic number, because the mean of its divisors is an integer number (2624500112).

Almost surely, 2^39645494757 is an apocalyptic number.

It is an amenable number.

39645494757 is a deficient number, since it is larger than the sum of its proper divisors (23342507931).

39645494757 is a wasteful number, since it uses less digits than its factorization.

39645494757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309622 (or 3309597 counting only the distinct ones).

The product of its digits is 114307200, while the sum is 63.

The spelling of 39645494757 in words is "thirty-nine billion, six hundred forty-five million, four hundred ninety-four thousand, seven hundred fifty-seven".