155367605551 has 4 divisors (see below), whose sum is σ = 156181048704. Its totient is φ = 154554162400.

The previous prime is 155367605539. The next prime is 155367605563. The reversal of 155367605551 is 155506763551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155506763551 = 179 ⋅868752869.

It is an interprime number because it is at equal distance from previous prime (155367605539) and next prime (155367605563).

It is a cyclic number.

It is not a de Polignac number, because 155367605551 - 2³³ = 146777670959 is a prime.

It is a super-2 number, since 2×155367605551² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155367605495 and 155367605504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155367605051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406721290 + ... + 406721671.

It is an arithmetic number, because the mean of its divisors is an integer number (39045262176).

Almost surely, 2^155367605551 is an apocalyptic number.

155367605551 is a deficient number, since it is larger than the sum of its proper divisors (813443153).

155367605551 is an equidigital number, since it uses as much as digits as its factorization.

155367605551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813443152.

The product of its (nonzero) digits is 2362500, while the sum is 49.

The spelling of 155367605551 in words is "one hundred fifty-five billion, three hundred sixty-seven million, six hundred five thousand, five hundred fifty-one".