31719552816 has 160 divisors (see below), whose sum is σ = 103468520448. Its totient is φ = 8158740480.

The previous prime is 31719552797. The next prime is 31719552829. The reversal of 31719552816 is 61825591713.

It is a super-2 number, since 2×31719552816² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10656 + ... + 252096.

Almost surely, 2^31719552816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31719552816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51734260224).

31719552816 is an abundant number, since it is smaller than the sum of its proper divisors (71748967632).

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

31719552816 is a wasteful number, since it uses less digits than its factorization.

31719552816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241499 (or 241493 counting only the distinct ones).

The product of its digits is 453600, while the sum is 48.

The spelling of 31719552816 in words is "thirty-one billion, seven hundred nineteen million, five hundred fifty-two thousand, eight hundred sixteen".