156554401 has 2 divisors, whose sum is σ = 156554402. Its totient is φ = 156554400.

The previous prime is 156554389. The next prime is 156554417. The reversal of 156554401 is 104455651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86397025 + 70157376 = 9295^2 + 8376^2 .

It is a cyclic number.

It is not a de Polignac number, because 156554401 - 2⁷ = 156554273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156554201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78277200 + 78277201.

It is an arithmetic number, because the mean of its divisors is an integer number (78277201).

Almost surely, 2^156554401 is an apocalyptic number.

It is an amenable number.

156554401 is a deficient number, since it is larger than the sum of its proper divisors (1).

156554401 is an equidigital number, since it uses as much as digits as its factorization.

156554401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 156554401 is about 12512.1701155315. The cubic root of 156554401 is about 538.9582120586.

The spelling of 156554401 in words is "one hundred fifty-six million, five hundred fifty-four thousand, four hundred one".