51009145960 has 32 divisors (see below), whose sum is σ = 114777684000. Its totient is φ = 20402395200.

The previous prime is 51009145937. The next prime is 51009145961. The reversal of 51009145960 is 6954190015.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (51009145961) 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, 877891 + ... + 934189.

It is an arithmetic number, because the mean of its divisors is an integer number (3586802625).

Almost surely, 2^51009145960 is an apocalyptic number.

It is an amenable number.

51009145960 is an abundant number, since it is smaller than the sum of its proper divisors (63768538040).

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

51009145960 is a wasteful number, since it uses less digits than its factorization.

51009145960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78961 (or 78957 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 40.

The spelling of 51009145960 in words is "fifty-one billion, nine million, one hundred forty-five thousand, nine hundred sixty".