31109554660 has 12 divisors (see below), whose sum is σ = 65330064828. Its totient is φ = 12443821856.

The previous prime is 31109554657. The next prime is 31109554661. The reversal of 31109554660 is 6645590113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3987417316 + 27122137344 = 63146^2 + 164688^2 .

It is a super-2 number, since 2×31109554660² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31109554661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777738847 + ... + 777738886.

It is an arithmetic number, because the mean of its divisors is an integer number (5444172069).

Almost surely, 2^31109554660 is an apocalyptic number.

It is an amenable number.

31109554660 is an abundant number, since it is smaller than the sum of its proper divisors (34220510168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31109554660 is a wasteful number, since it uses less digits than its factorization.

31109554660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555477742 (or 1555477740 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 31109554660 in words is "thirty-one billion, one hundred nine million, five hundred fifty-four thousand, six hundred sixty".