52172016557 has 2 divisors, whose sum is σ = 52172016558. Its totient is φ = 52172016556.

The previous prime is 52172016551. The next prime is 52172016667. The reversal of 52172016557 is 75561027125.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51628473961 + 543542596 = 227219^2 + 23314^2 .

It is a cyclic number.

It is not a de Polignac number, because 52172016557 - 2⁴ = 52172016541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52172016551) 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 as a sum of consecutive naturals, namely, 26086008278 + 26086008279.

It is an arithmetic number, because the mean of its divisors is an integer number (26086008279).

Almost surely, 2^52172016557 is an apocalyptic number.

It is an amenable number.

52172016557 is a deficient number, since it is larger than the sum of its proper divisors (1).

52172016557 is an equidigital number, since it uses as much as digits as its factorization.

52172016557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 147000, while the sum is 41.

The spelling of 52172016557 in words is "fifty-two billion, one hundred seventy-two million, sixteen thousand, five hundred fifty-seven".