47100851561 has 2 divisors, whose sum is σ = 47100851562. Its totient is φ = 47100851560.

The previous prime is 47100851557. The next prime is 47100851587. The reversal of 47100851561 is 16515800174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31922611561 + 15178240000 = 178669^2 + 123200^2 .

It is a cyclic number.

It is not a de Polignac number, because 47100851561 - 2² = 47100851557 is a prime.

It is a super-2 number, since 2×47100851561² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (47100851521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23550425780 + 23550425781.

It is an arithmetic number, because the mean of its divisors is an integer number (23550425781).

Almost surely, 2^47100851561 is an apocalyptic number.

It is an amenable number.

47100851561 is a deficient number, since it is larger than the sum of its proper divisors (1).

47100851561 is an equidigital number, since it uses as much as digits as its factorization.

47100851561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 38.

The spelling of 47100851561 in words is "forty-seven billion, one hundred million, eight hundred fifty-one thousand, five hundred sixty-one".