156623725439957 has 2 divisors, whose sum is σ = 156623725439958. Its totient is φ = 156623725439956.

The previous prime is 156623725439939. The next prime is 156623725440001. The reversal of 156623725439957 is 759934527326651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156240225152881 + 383500287076 = 12499609^2 + 619274^2 .

It is a cyclic number.

It is not a de Polignac number, because 156623725439957 - 2¹⁴ = 156623725423573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156623725439057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78311862719978 + 78311862719979.

It is an arithmetic number, because the mean of its divisors is an integer number (78311862719979).

Almost surely, 2^{156623725439957} is an apocalyptic number.

It is an amenable number.

156623725439957 is a deficient number, since it is larger than the sum of its proper divisors (1).

156623725439957 is an equidigital number, since it uses as much as digits as its factorization.

156623725439957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2571912000, while the sum is 74.

The spelling of 156623725439957 in words is "one hundred fifty-six trillion, six hundred twenty-three billion, seven hundred twenty-five million, four hundred thirty-nine thousand, nine hundred fifty-seven".