155975579551 has 16 divisors (see below), whose sum is σ = 186898141440. Its totient is φ = 128492464320.

The previous prime is 155975579533. The next prime is 155975579563.

155975579551 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 155975579551 - 2¹¹ = 155975577503 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 (155975579521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16218990 + ... + 16228603.

It is an arithmetic number, because the mean of its divisors is an integer number (11681133840).

Almost surely, 2^155975579551 is an apocalyptic number.

155975579551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155975579551 is a deficient number, since it is larger than the sum of its proper divisors (30922561889).

155975579551 is a wasteful number, since it uses less digits than its factorization.

155975579551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32447646.

The product of its digits is 62015625, while the sum is 64.

The spelling of 155975579551 in words is "one hundred fifty-five billion, nine hundred seventy-five million, five hundred seventy-nine thousand, five hundred fifty-one".