38947995945 has 48 divisors (see below), whose sum is σ = 71607453840. Its totient is φ = 19515789312.

The previous prime is 38947995913. The next prime is 38947996001. The reversal of 38947995945 is 54959974983.

38947995945 is a `hidden beast` number, since 389 + 4 + 79 + 95 + 94 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 8554955049 + 30393040896 = 92493^2 + 174336^2 .

It is not a de Polignac number, because 38947995945 - 2⁵ = 38947995913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 390547 + ... + 480023.

It is an arithmetic number, because the mean of its divisors is an integer number (1491821955).

Almost surely, 2^38947995945 is an apocalyptic number.

It is an amenable number.

38947995945 is a deficient number, since it is larger than the sum of its proper divisors (32659457895).

38947995945 is a wasteful number, since it uses less digits than its factorization.

38947995945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90074 (or 90071 counting only the distinct ones).

The product of its digits is 440899200, while the sum is 72.

The spelling of 38947995945 in words is "thirty-eight billion, nine hundred forty-seven million, nine hundred ninety-five thousand, nine hundred forty-five".