56147973961 has 2 divisors, whose sum is σ = 56147973962. Its totient is φ = 56147973960.

The previous prime is 56147973923. The next prime is 56147973989. The reversal of 56147973961 is 16937974165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47783774025 + 8364199936 = 218595^2 + 91456^2 .

It is a cyclic number.

It is not a de Polignac number, because 56147973961 - 2¹⁷ = 56147842889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56147973896 and 56147973905.

It is not a weakly prime, because it can be changed into another prime (56147973061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28073986980 + 28073986981.

It is an arithmetic number, because the mean of its divisors is an integer number (28073986981).

Almost surely, 2^56147973961 is an apocalyptic number.

It is an amenable number.

56147973961 is a deficient number, since it is larger than the sum of its proper divisors (1).

56147973961 is an equidigital number, since it uses as much as digits as its factorization.

56147973961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8573040, while the sum is 58.

The spelling of 56147973961 in words is "fifty-six billion, one hundred forty-seven million, nine hundred seventy-three thousand, nine hundred sixty-one".