39815940834 has 48 divisors (see below), whose sum is σ = 86601116160. Its totient is φ = 13220798400.

The previous prime is 39815940821. The next prime is 39815940841. The reversal of 39815940834 is 43804951893.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6860734 + ... + 6866534.

It is an arithmetic number, because the mean of its divisors is an integer number (1804189920).

Almost surely, 2^39815940834 is an apocalyptic number.

39815940834 is an abundant number, since it is smaller than the sum of its proper divisors (46785175326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39815940834 is a wasteful number, since it uses less digits than its factorization.

39815940834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7215 (or 7212 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 39815940834 in words is "thirty-nine billion, eight hundred fifteen million, nine hundred forty thousand, eight hundred thirty-four".