155696696551 has 16 divisors (see below), whose sum is σ = 173301131808. Its totient is φ = 138696192000.

The previous prime is 155696696527. The next prime is 155696696567.

155696696551 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 155696696551 - 2¹⁹ = 155696172263 is a prime.

It is a super-2 number, since 2×155696696551² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155696696591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 614610 + ... + 830143.

It is an arithmetic number, because the mean of its divisors is an integer number (10831320738).

Almost surely, 2^155696696551 is an apocalyptic number.

155696696551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155696696551 is a deficient number, since it is larger than the sum of its proper divisors (17604435257).

155696696551 is a wasteful number, since it uses less digits than its factorization.

155696696551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444962.

The product of its digits is 65610000, while the sum is 64.

The spelling of 155696696551 in words is "one hundred fifty-five billion, six hundred ninety-six million, six hundred ninety-six thousand, five hundred fifty-one".