51720935353 has 8 divisors (see below), whose sum is σ = 52764886688. Its totient is φ = 50684984064.

The previous prime is 51720935347. The next prime is 51720935359. The reversal of 51720935353 is 35353902715.

It is an interprime number because it is at equal distance from previous prime (51720935347) and next prime (51720935359).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51720935353 is a prime.

It is a Duffinian number.

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, 1986951 + ... + 2012812.

It is an arithmetic number, because the mean of its divisors is an integer number (6595610836).

Almost surely, 2^51720935353 is an apocalyptic number.

It is an amenable number.

51720935353 is a deficient number, since it is larger than the sum of its proper divisors (1043951335).

51720935353 is a wasteful number, since it uses less digits than its factorization.

51720935353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000023.

The product of its (nonzero) digits is 425250, while the sum is 43.

The spelling of 51720935353 in words is "fifty-one billion, seven hundred twenty million, nine hundred thirty-five thousand, three hundred fifty-three".