155987157299 has 2 divisors, whose sum is σ = 155987157300. Its totient is φ = 155987157298.

The previous prime is 155987157281. The next prime is 155987157331. The reversal of 155987157299 is 992751789551.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155987157299 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (155987157899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77993578649 + 77993578650.

It is an arithmetic number, because the mean of its divisors is an integer number (77993578650).

Almost surely, 2^155987157299 is an apocalyptic number.

155987157299 is a deficient number, since it is larger than the sum of its proper divisors (1).

155987157299 is an equidigital number, since it uses as much as digits as its factorization.

155987157299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442000, while the sum is 68.

The spelling of 155987157299 in words is "one hundred fifty-five billion, nine hundred eighty-seven million, one hundred fifty-seven thousand, two hundred ninety-nine".