155796697551 has 16 divisors (see below), whose sum is σ = 233923488768. Its totient is φ = 91376361600.

The previous prime is 155796697549. The next prime is 155796697571.

155796697551 is nontrivially palindromic in base 10.

155796697551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 155796697551 - 2¹ = 155796697549 is a prime.

It is a super-2 number, since 2×155796697551² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155796697541) 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 15 ways as a sum of consecutive naturals, for example, 76145946 + ... + 76147991.

It is an arithmetic number, because the mean of its divisors is an integer number (14620218048).

Almost surely, 2^155796697551 is an apocalyptic number.

155796697551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155796697551 is a deficient number, since it is larger than the sum of its proper divisors (78126791217).

155796697551 is a wasteful number, since it uses less digits than its factorization.

155796697551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152293982.

The product of its digits is 89302500, while the sum is 66.

The spelling of 155796697551 in words is "one hundred fifty-five billion, seven hundred ninety-six million, six hundred ninety-seven thousand, five hundred fifty-one".