51216836001 has 4 divisors (see below), whose sum is σ = 68289114672. Its totient is φ = 34144557332.

The previous prime is 51216835991. The next prime is 51216836009. The reversal of 51216836001 is 10063861215.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51216836001 - 2³³ = 42626901409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51216836009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8536139331 + ... + 8536139336.

It is an arithmetic number, because the mean of its divisors is an integer number (17072278668).

Almost surely, 2^51216836001 is an apocalyptic number.

It is an amenable number.

51216836001 is a deficient number, since it is larger than the sum of its proper divisors (17072278671).

51216836001 is a wasteful number, since it uses less digits than its factorization.

51216836001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17072278670.

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 51216836001 in words is "fifty-one billion, two hundred sixteen million, eight hundred thirty-six thousand, one".