31080724416 has 168 divisors, whose sum is σ = 101906588160. Its totient is φ = 8872137216.

The previous prime is 31080724357. The next prime is 31080724427. The reversal of 31080724416 is 61442708013.

It is a tau number, because it is divible by the number of its divisors (168).

It is a super-2 number, since 2×31080724416² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 5508925 + ... + 5514563.

Almost surely, 2^31080724416 is an apocalyptic number.

31080724416 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31080724416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50953294080).

31080724416 is an abundant number, since it is smaller than the sum of its proper divisors (70825863744).

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

31080724416 is a wasteful number, since it uses less digits than its factorization.

31080724416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7031 (or 7018 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 31080724416 in words is "thirty-one billion, eighty million, seven hundred twenty-four thousand, four hundred sixteen".