51607715501 has 4 divisors (see below), whose sum is σ = 51658863900. Its totient is φ = 51556567104.

The previous prime is 51607715479. The next prime is 51607715521. The reversal of 51607715501 is 10551770615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8155896100 + 43451819401 = 90310^2 + 208451^2 .

It is a cyclic number.

It is not a de Polignac number, because 51607715501 - 2⁶ = 51607715437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51607715521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25572686 + ... + 25574703.

It is an arithmetic number, because the mean of its divisors is an integer number (12914715975).

Almost surely, 2^51607715501 is an apocalyptic number.

It is an amenable number.

51607715501 is a deficient number, since it is larger than the sum of its proper divisors (51148399).

51607715501 is a wasteful number, since it uses less digits than its factorization.

51607715501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51148398.

The product of its (nonzero) digits is 36750, while the sum is 38.

The spelling of 51607715501 in words is "fifty-one billion, six hundred seven million, seven hundred fifteen thousand, five hundred one".