56405166150457 has 2 divisors, whose sum is σ = 56405166150458. Its totient is φ = 56405166150456.

The previous prime is 56405166150451. The next prime is 56405166150551. The reversal of 56405166150457 is 75405166150465.

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., 43729401578041 + 12675764572416 = 6612821^2 + 3560304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56405166150457 is a prime.

It is a super-2 number, since 2×56405166150457² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56405166150398 and 56405166150407.

It is not a weakly prime, because it can be changed into another prime (56405166150451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28202583075228 + 28202583075229.

It is an arithmetic number, because the mean of its divisors is an integer number (28202583075229).

Almost surely, 2^{56405166150457} is an apocalyptic number.

It is an amenable number.

56405166150457 is a deficient number, since it is larger than the sum of its proper divisors (1).

56405166150457 is an equidigital number, since it uses as much as digits as its factorization.

56405166150457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120000, while the sum is 55.

The spelling of 56405166150457 in words is "fifty-six trillion, four hundred five billion, one hundred sixty-six million, one hundred fifty thousand, four hundred fifty-seven".