51641511252 has 48 divisors (see below), whose sum is σ = 127654188480. Its totient is φ = 16192461312.

The previous prime is 51641511223. The next prime is 51641511319. The reversal of 51641511252 is 25211514615.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313074 + ... + 448662.

It is an arithmetic number, because the mean of its divisors is an integer number (2659462260).

Almost surely, 2^51641511252 is an apocalyptic number.

It is an amenable number.

51641511252 is an abundant number, since it is smaller than the sum of its proper divisors (76012677228).

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

51641511252 is a wasteful number, since it uses less digits than its factorization.

51641511252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137480 (or 137478 counting only the distinct ones).

The product of its digits is 12000, while the sum is 33.

The spelling of 51641511252 in words is "fifty-one billion, six hundred forty-one million, five hundred eleven thousand, two hundred fifty-two".