155369931073981 has 16 divisors (see below), whose sum is σ = 174659593006080. Its totient is φ = 137232537298560.

The previous prime is 155369931073939. The next prime is 155369931073993. The reversal of 155369931073981 is 189370139963551.

It is a cyclic number.

It is not a de Polignac number, because 155369931073981 - 2⁷ = 155369931073853 is a prime.

It is a super-2 number, since 2×155369931073981² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155369931073981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155369931077981) 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, 2165881705 + ... + 2165953438.

It is an arithmetic number, because the mean of its divisors is an integer number (10916224562880).

Almost surely, 2^{155369931073981} is an apocalyptic number.

It is an amenable number.

155369931073981 is a deficient number, since it is larger than the sum of its proper divisors (19289661932099).

155369931073981 is a wasteful number, since it uses less digits than its factorization.

155369931073981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4331835276.

The product of its (nonzero) digits is 165337200, while the sum is 70.

The spelling of 155369931073981 in words is "one hundred fifty-five trillion, three hundred sixty-nine billion, nine hundred thirty-one million, seventy-three thousand, nine hundred eighty-one".