31405753664442 has 40 divisors (see below), whose sum is σ = 70620816679776. Its totient is φ = 10431593074728.

The previous prime is 31405753664423. The next prime is 31405753664447. The reversal of 31405753664442 is 24446635750413.

31405753664442 is a `hidden beast` number, since 3 + 1 + 4 + 0 + 5 + 7 + 536 + 64 + 4 + 42 = 666.

It is a super-2 number, since 2×31405753664442² (a number of 28 digits) contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (31405753664447) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 342467718 + ... + 342559409.

Almost surely, 2^{31405753664442} is an apocalyptic number.

31405753664442 is an abundant number, since it is smaller than the sum of its proper divisors (39215063015334).

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

31405753664442 is a wasteful number, since it uses less digits than its factorization.

31405753664442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685027424 (or 685027415 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 54.

The spelling of 31405753664442 in words is "thirty-one trillion, four hundred five billion, seven hundred fifty-three million, six hundred sixty-four thousand, four hundred forty-two".