155019584891 has 2 divisors, whose sum is σ = 155019584892. Its totient is φ = 155019584890.

The previous prime is 155019584851. The next prime is 155019584893. The reversal of 155019584891 is 198485910551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155019584891 is a prime.

Together with 155019584893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (155019584893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77509792445 + 77509792446.

It is an arithmetic number, because the mean of its divisors is an integer number (77509792446).

Almost surely, 2^155019584891 is an apocalyptic number.

155019584891 is a deficient number, since it is larger than the sum of its proper divisors (1).

155019584891 is an equidigital number, since it uses as much as digits as its factorization.

155019584891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592000, while the sum is 56.

The spelling of 155019584891 in words is "one hundred fifty-five billion, nineteen million, five hundred eighty-four thousand, eight hundred ninety-one".