155587102691 has 2 divisors, whose sum is σ = 155587102692. Its totient is φ = 155587102690.

The previous prime is 155587102639. The next prime is 155587102729. The reversal of 155587102691 is 196201785551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155587102691 is a prime.

It is not a weakly prime, because it can be changed into another prime (155587102591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77793551345 + 77793551346.

It is an arithmetic number, because the mean of its divisors is an integer number (77793551346).

Almost surely, 2^155587102691 is an apocalyptic number.

155587102691 is a deficient number, since it is larger than the sum of its proper divisors (1).

155587102691 is an equidigital number, since it uses as much as digits as its factorization.

155587102691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756000, while the sum is 50.

The spelling of 155587102691 in words is "one hundred fifty-five billion, five hundred eighty-seven million, one hundred two thousand, six hundred ninety-one".