155720522100671 has 16 divisors (see below), whose sum is σ = 171215950672800. Its totient is φ = 140452630425600.

The previous prime is 155720522100629. The next prime is 155720522100713. The reversal of 155720522100671 is 176001225027551.

It is an interprime number because it is at equal distance from previous prime (155720522100629) and next prime (155720522100713).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155720522100671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155720522100601) 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, 108469586 + ... + 109895823.

It is an arithmetic number, because the mean of its divisors is an integer number (10700996917050).

Almost surely, 2^{155720522100671} is an apocalyptic number.

155720522100671 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

155720522100671 is a deficient number, since it is larger than the sum of its proper divisors (15495428572129).

155720522100671 is a wasteful number, since it uses less digits than its factorization.

155720522100671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218365930.

The product of its (nonzero) digits is 294000, while the sum is 44.

The spelling of 155720522100671 in words is "one hundred fifty-five trillion, seven hundred twenty billion, five hundred twenty-two million, one hundred thousand, six hundred seventy-one".