31405626980 has 96 divisors (see below), whose sum is σ = 81716947200. Its totient is φ = 9872570880.

The previous prime is 31405626977. The next prime is 31405626997. The reversal of 31405626980 is 8962650413.

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, 213275 + ... + 329085.

It is an arithmetic number, because the mean of its divisors is an integer number (851218200).

Almost surely, 2^31405626980 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 31405626980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40858473600).

31405626980 is an abundant number, since it is smaller than the sum of its proper divisors (50311320220).

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

31405626980 is a wasteful number, since it uses less digits than its factorization.

31405626980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115989 (or 115987 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 31405626980 in words is "thirty-one billion, four hundred five million, six hundred twenty-six thousand, nine hundred eighty".