51765810432 has 72 divisors (see below), whose sum is σ = 157454356416. Its totient is φ = 14790230016.

The previous prime is 51765810431. The next prime is 51765810457. The reversal of 51765810432 is 23401856715.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51765810431) 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, 4809153 + ... + 4819904.

Almost surely, 2^51765810432 is an apocalyptic number.

It is an amenable number.

51765810432 is an abundant number, since it is smaller than the sum of its proper divisors (105688545984).

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

51765810432 is an equidigital number, since it uses as much as digits as its factorization.

51765810432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9629083 (or 9629069 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 42.

The spelling of 51765810432 in words is "fifty-one billion, seven hundred sixty-five million, eight hundred ten thousand, four hundred thirty-two".