155436791 has 2 divisors, whose sum is σ = 155436792. Its totient is φ = 155436790.

The previous prime is 155436779. The next prime is 155436817. The reversal of 155436791 is 197634551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155436791 - 2²⁶ = 88327927 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155436761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77718395 + 77718396.

It is an arithmetic number, because the mean of its divisors is an integer number (77718396).

Almost surely, 2^155436791 is an apocalyptic number.

155436791 is a deficient number, since it is larger than the sum of its proper divisors (1).

155436791 is an equidigital number, since it uses as much as digits as its factorization.

155436791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 113400, while the sum is 41.

The square root of 155436791 is about 12467.4292057344. The cubic root of 155436791 is about 537.6726437301.

The spelling of 155436791 in words is "one hundred fifty-five million, four hundred thirty-six thousand, seven hundred ninety-one".