31380037355188 has 6 divisors (see below), whose sum is σ = 54915065371586. Its totient is φ = 15690018677592.

The previous prime is 31380037355179. The next prime is 31380037355209. The reversal of 31380037355188 is 88155373008313.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 21044403906724 + 10335633448464 = 4587418^2 + 3214908^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3922504669395 + ... + 3922504669402.

Almost surely, 2^{31380037355188} is an apocalyptic number.

It is an amenable number.

31380037355188 is a deficient number, since it is larger than the sum of its proper divisors (23535028016398).

31380037355188 is a wasteful number, since it uses less digits than its factorization.

31380037355188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7845009338801 (or 7845009338799 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 31380037355188 in words is "thirty-one trillion, three hundred eighty billion, thirty-seven million, three hundred fifty-five thousand, one hundred eighty-eight".