31347780772 has 36 divisors (see below), whose sum is σ = 69616504944. Its totient is φ = 12213420240.

The previous prime is 31347780731. The next prime is 31347780787. The reversal of 31347780772 is 27708774313.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 7267738 + ... + 7272049.

It is an arithmetic number, because the mean of its divisors is an integer number (1933791804).

Almost surely, 2^31347780772 is an apocalyptic number.

It is an amenable number.

31347780772 is an abundant number, since it is smaller than the sum of its proper divisors (38268724172).

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

31347780772 is a wasteful number, since it uses less digits than its factorization.

31347780772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14539816 (or 14539807 counting only the distinct ones).

The product of its (nonzero) digits is 1382976, while the sum is 49.

The spelling of 31347780772 in words is "thirty-one billion, three hundred forty-seven million, seven hundred eighty thousand, seven hundred seventy-two".