31068055581557 has 8 divisors (see below), whose sum is σ = 32140127065440. Its totient is φ = 29996034712560.

The previous prime is 31068055581491. The next prime is 31068055581599. The reversal of 31068055581557 is 75518555086013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31068055581557 - 2²⁸ = 31067787146101 is a prime.

It is a super-2 number, since 2×31068055581557² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31068055581496 and 31068055581505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31068055581257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11402819 + ... + 13862192.

It is an arithmetic number, because the mean of its divisors is an integer number (4017515883180).

Almost surely, 2^{31068055581557} is an apocalyptic number.

It is an amenable number.

31068055581557 is a deficient number, since it is larger than the sum of its proper divisors (1072071483883).

31068055581557 is a wasteful number, since it uses less digits than its factorization.

31068055581557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25307443.

The product of its (nonzero) digits is 25200000, while the sum is 59.

The spelling of 31068055581557 in words is "thirty-one trillion, sixty-eight billion, fifty-five million, five hundred eighty-one thousand, five hundred fifty-seven".