156156901949 has 2 divisors, whose sum is σ = 156156901950. Its totient is φ = 156156901948.

The previous prime is 156156901907. The next prime is 156156901961. The reversal of 156156901949 is 949109651651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144483612100 + 11673289849 = 380110^2 + 108043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-156156901949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 156156901894 and 156156901903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156156903949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78078450974 + 78078450975.

It is an arithmetic number, because the mean of its divisors is an integer number (78078450975).

Almost surely, 2^156156901949 is an apocalyptic number.

It is an amenable number.

156156901949 is a deficient number, since it is larger than the sum of its proper divisors (1).

156156901949 is an equidigital number, since it uses as much as digits as its factorization.

156156901949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2624400, while the sum is 56.

The spelling of 156156901949 in words is "one hundred fifty-six billion, one hundred fifty-six million, nine hundred one thousand, nine hundred forty-nine".