51615035394 has 16 divisors (see below), whose sum is σ = 111170845632. Its totient is φ = 15881549328.

The previous prime is 51615035393. The next prime is 51615035411. The reversal of 51615035394 is 49353051615.

It is a super-2 number, since 2×51615035394² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51615035393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330865534 + ... + 330865689.

It is an arithmetic number, because the mean of its divisors is an integer number (6948177852).

Almost surely, 2^51615035394 is an apocalyptic number.

51615035394 is an abundant number, since it is smaller than the sum of its proper divisors (59555810238).

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

51615035394 is a wasteful number, since it uses less digits than its factorization.

51615035394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661731241.

The product of its (nonzero) digits is 243000, while the sum is 42.

The spelling of 51615035394 in words is "fifty-one billion, six hundred fifteen million, thirty-five thousand, three hundred ninety-four".