163557002461 has 2 divisors, whose sum is σ = 163557002462. Its totient is φ = 163557002460.

The previous prime is 163557002449. The next prime is 163557002579. The reversal of 163557002461 is 164200755361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163483557561 + 73444900 = 404331^2 + 8570^2 .

It is a cyclic number.

It is not a de Polignac number, because 163557002461 - 2¹³ = 163556994269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163557042461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81778501230 + 81778501231.

It is an arithmetic number, because the mean of its divisors is an integer number (81778501231).

Almost surely, 2^163557002461 is an apocalyptic number.

It is an amenable number.

163557002461 is a deficient number, since it is larger than the sum of its proper divisors (1).

163557002461 is an equidigital number, since it uses as much as digits as its factorization.

163557002461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 163557002461 in words is "one hundred sixty-three billion, five hundred fifty-seven million, two thousand, four hundred sixty-one".