51720935354 has 16 divisors (see below), whose sum is σ = 89612744256. Its totient is φ = 22126603200.

The previous prime is 51720935347. The next prime is 51720935359. The reversal of 51720935354 is 45353902715.

It is not an unprimeable number, because it can be changed into a prime (51720935359) 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, 69145262 + ... + 69146009.

It is an arithmetic number, because the mean of its divisors is an integer number (5600796516).

Almost surely, 2^51720935354 is an apocalyptic number.

51720935354 is a deficient number, since it is larger than the sum of its proper divisors (37891808902).

51720935354 is a wasteful number, since it uses less digits than its factorization.

51720935354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138291301.

The product of its (nonzero) digits is 567000, while the sum is 44.

The spelling of 51720935354 in words is "fifty-one billion, seven hundred twenty million, nine hundred thirty-five thousand, three hundred fifty-four".