155710511655171 has 24 divisors (see below), whose sum is σ = 236763465763776. Its totient is φ = 90266963268240.

The previous prime is 155710511655131. The next prime is 155710511655199. The reversal of 155710511655171 is 171556115017551.

It is not a de Polignac number, because 155710511655171 - 2²² = 155710507460867 is a prime.

It is a super-2 number, since 2×155710511655171² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155710511655131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4459812745 + ... + 4459847658.

It is an arithmetic number, because the mean of its divisors is an integer number (9865144406824).

Almost surely, 2^{155710511655171} is an apocalyptic number.

155710511655171 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155710511655171 is a deficient number, since it is larger than the sum of its proper divisors (81052954108605).

155710511655171 is a wasteful number, since it uses less digits than its factorization.

155710511655171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8919660463 (or 8919660440 counting only the distinct ones).

The product of its (nonzero) digits is 918750, while the sum is 51.

The spelling of 155710511655171 in words is "one hundred fifty-five trillion, seven hundred ten billion, five hundred eleven million, six hundred fifty-five thousand, one hundred seventy-one".