51939908029394 has 128 divisors (see below), whose sum is σ = 101725940219904. Its totient is φ = 19298988072000.

The previous prime is 51939908029357. The next prime is 51939908029397. The reversal of 51939908029394 is 49392080993915.

It is a super-2 number, since 2×51939908029394² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is not an unprimeable number, because it can be changed into a prime (51939908029397) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 775154297 + ... + 775221299.

It is an arithmetic number, because the mean of its divisors is an integer number (794733907968).

Almost surely, 2^{51939908029394} is an apocalyptic number.

51939908029394 is a deficient number, since it is larger than the sum of its proper divisors (49786032190510).

51939908029394 is a wasteful number, since it uses less digits than its factorization.

51939908029394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69412.

The product of its (nonzero) digits is 170061120, while the sum is 71.

The spelling of 51939908029394 in words is "fifty-one trillion, nine hundred thirty-nine billion, nine hundred eight million, twenty-nine thousand, three hundred ninety-four".