52019156376721 has 4 divisors (see below), whose sum is σ = 52021768718052. Its totient is φ = 52016544035392.

The previous prime is 52019156376713. The next prime is 52019156376763. The reversal of 52019156376721 is 12767365191025.

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 23295720046096 + 28723436330625 = 4826564^2 + 5359425^2 .

It is a cyclic number.

It is not a de Polignac number, because 52019156376721 - 2³ = 52019156376713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52019156376521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1306140796 + ... + 1306180621.

It is an arithmetic number, because the mean of its divisors is an integer number (13005442179513).

Almost surely, 2^{52019156376721} is an apocalyptic number.

It is an amenable number.

52019156376721 is a deficient number, since it is larger than the sum of its proper divisors (2612341331).

52019156376721 is a wasteful number, since it uses less digits than its factorization.

52019156376721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612341330.

The product of its (nonzero) digits is 4762800, while the sum is 55.

The spelling of 52019156376721 in words is "fifty-two trillion, nineteen billion, one hundred fifty-six million, three hundred seventy-six thousand, seven hundred twenty-one".