31553377648 has 40 divisors (see below), whose sum is σ = 65922843168. Its totient is φ = 14544183552.

The previous prime is 31553377631. The next prime is 31553377693. The reversal of 31553377648 is 84677335513.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 31553377595 and 31553377604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62661 + ... + 258907.

Almost surely, 2^31553377648 is an apocalyptic number.

It is an amenable number.

31553377648 is an abundant number, since it is smaller than the sum of its proper divisors (34369465520).

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

31553377648 is a wasteful number, since it uses less digits than its factorization.

31553377648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197041 (or 197035 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 52.

The spelling of 31553377648 in words is "thirty-one billion, five hundred fifty-three million, three hundred seventy-seven thousand, six hundred forty-eight".