31742874648 has 32 divisors (see below), whose sum is σ = 88174652400. Its totient is φ = 10580958144.

The previous prime is 31742874643. The next prime is 31742874649. The reversal of 31742874648 is 84647824713.

31742874648 is a `hidden beast` number, since 3 + 174 + 2 + 8 + 7 + 464 + 8 = 666.

It is a super-2 number, since 2×31742874648² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 31742874594 and 31742874603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31742874643) 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, 73478661 + ... + 73479092.

Almost surely, 2^31742874648 is an apocalyptic number.

It is an amenable number.

31742874648 is an abundant number, since it is smaller than the sum of its proper divisors (56431777752).

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

31742874648 is a wasteful number, since it uses less digits than its factorization.

31742874648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146957768 (or 146957758 counting only the distinct ones).

The product of its digits is 7225344, while the sum is 54.

The spelling of 31742874648 in words is "thirty-one billion, seven hundred forty-two million, eight hundred seventy-four thousand, six hundred forty-eight".