31788663284742 has 48 divisors (see below), whose sum is σ = 78678956989440. Its totient is φ = 8383823282016.

The previous prime is 31788663284723. The next prime is 31788663284761. The reversal of 31788663284742 is 24748236688713.

It is an interprime number because it is at equal distance from previous prime (31788663284723) and next prime (31788663284761).

It is a super-2 number, since 2×31788663284742² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2239261942 + ... + 2239276137.

It is an arithmetic number, because the mean of its divisors is an integer number (1639144937280).

Almost surely, 2^{31788663284742} is an apocalyptic number.

31788663284742 is an abundant number, since it is smaller than the sum of its proper divisors (46890293704698).

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

31788663284742 is a wasteful number, since it uses less digits than its factorization.

31788663284742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4478538117 (or 4478538104 counting only the distinct ones).

The product of its digits is 520224768, while the sum is 69.

The spelling of 31788663284742 in words is "thirty-one trillion, seven hundred eighty-eight billion, six hundred sixty-three million, two hundred eighty-four thousand, seven hundred forty-two".