155858858551 has 4 divisors (see below), whose sum is σ = 170027845704. Its totient is φ = 141689871400.

The previous prime is 155858858537. The next prime is 155858858557.

155858858551 is nontrivially palindromic in base 10.

155858858551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 155858858551 - 2²¹ = 155856761399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155858858557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7084493560 + ... + 7084493581.

It is an arithmetic number, because the mean of its divisors is an integer number (42506961426).

Almost surely, 2^155858858551 is an apocalyptic number.

155858858551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155858858551 is a deficient number, since it is larger than the sum of its proper divisors (14168987153).

155858858551 is a wasteful number, since it uses less digits than its factorization.

155858858551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14168987152.

The product of its digits is 64000000, while the sum is 64.

The spelling of 155858858551 in words is "one hundred fifty-five billion, eight hundred fifty-eight million, eight hundred fifty-eight thousand, five hundred fifty-one".