1656885137 has 2 divisors, whose sum is σ = 1656885138. Its totient is φ = 1656885136.

The previous prime is 1656885079. The next prime is 1656885151. The reversal of 1656885137 is 7315886561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1411054096 + 245831041 = 37564^2 + 15679^2 .

It is a cyclic number.

It is not a de Polignac number, because 1656885137 - 2¹⁶ = 1656819601 is a prime.

It is not a weakly prime, because it can be changed into another prime (1656885337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828442568 + 828442569.

It is an arithmetic number, because the mean of its divisors is an integer number (828442569).

Almost surely, 2^1656885137 is an apocalyptic number.

It is an amenable number.

1656885137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656885137 is an equidigital number, since it uses as much as digits as its factorization.

1656885137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1209600, while the sum is 50.

The square root of 1656885137 is about 40704.8539734514. The cubic root of 1656885137 is about 1183.3070919174.

The spelling of 1656885137 in words is "one billion, six hundred fifty-six million, eight hundred eighty-five thousand, one hundred thirty-seven".