51219827705615 has 16 divisors (see below), whose sum is σ = 61582858892928. Its totient is φ = 40896489000096.

The previous prime is 51219827705591. The next prime is 51219827705771. The reversal of 51219827705615 is 51650772891215.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51219827705615 - 2²⁴ = 51219810928399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114279344 + ... + 114726666.

It is an arithmetic number, because the mean of its divisors is an integer number (3848928680808).

Almost surely, 2^{51219827705615} is an apocalyptic number.

51219827705615 is a deficient number, since it is larger than the sum of its proper divisors (10363031187313).

51219827705615 is a wasteful number, since it uses less digits than its factorization.

51219827705615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491638.

The product of its (nonzero) digits is 10584000, while the sum is 59.

The spelling of 51219827705615 in words is "fifty-one trillion, two hundred nineteen billion, eight hundred twenty-seven million, seven hundred five thousand, six hundred fifteen".