52561087477 has 2 divisors, whose sum is σ = 52561087478. Its totient is φ = 52561087476.

The previous prime is 52561087429. The next prime is 52561087483. The reversal of 52561087477 is 77478016525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48017518641 + 4543568836 = 219129^2 + 67406^2 .

It is a cyclic number.

It is not a de Polignac number, because 52561087477 - 2³¹ = 50413603829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52561087487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26280543738 + 26280543739.

It is an arithmetic number, because the mean of its divisors is an integer number (26280543739).

Almost surely, 2^52561087477 is an apocalyptic number.

It is an amenable number.

52561087477 is a deficient number, since it is larger than the sum of its proper divisors (1).

52561087477 is an equidigital number, since it uses as much as digits as its factorization.

52561087477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3292800, while the sum is 52.

The spelling of 52561087477 in words is "fifty-two billion, five hundred sixty-one million, eighty-seven thousand, four hundred seventy-seven".