51920503390 has 64 divisors (see below), whose sum is σ = 110067465600. Its totient is φ = 17624947200.

The previous prime is 51920503379. The next prime is 51920503391. The reversal of 51920503390 is 9330502915.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51920503391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 271494 + ... + 421366.

It is an arithmetic number, because the mean of its divisors is an integer number (1719804150).

Almost surely, 2^51920503390 is an apocalyptic number.

51920503390 is an abundant number, since it is smaller than the sum of its proper divisors (58146962210).

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

51920503390 is a wasteful number, since it uses less digits than its factorization.

51920503390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150002 (or 149988 counting only the distinct ones).

The product of its (nonzero) digits is 36450, while the sum is 37.

The spelling of 51920503390 in words is "fifty-one billion, nine hundred twenty million, five hundred three thousand, three hundred ninety".