51791111917312 has 72 divisors (see below), whose sum is σ = 115222196250000. Its totient is φ = 23089535926272.

The previous prime is 51791111917267. The next prime is 51791111917319. The reversal of 51791111917312 is 21371911119715.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51791111917319) 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, 313089187 + ... + 313254562.

It is an arithmetic number, because the mean of its divisors is an integer number (1600308281250).

Almost surely, 2^{51791111917312} is an apocalyptic number.

It is an amenable number.

51791111917312 is an abundant number, since it is smaller than the sum of its proper divisors (63431084332688).

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

51791111917312 is a wasteful number, since it uses less digits than its factorization.

51791111917312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626343801 (or 626343787 counting only the distinct ones).

The product of its digits is 119070, while the sum is 49.

The spelling of 51791111917312 in words is "fifty-one trillion, seven hundred ninety-one billion, one hundred eleven million, nine hundred seventeen thousand, three hundred twelve".