31486947458 has 18 divisors (see below), whose sum is σ = 47507954787. Its totient is φ = 15651502020.

The previous prime is 31486947451. The next prime is 31486947463. The reversal of 31486947458 is 85474968413.

It can be written as a sum of positive squares in only one way, i.e., 15743473729 + 15743473729 = 125473^2 + 125473^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=125473.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31486947397 and 31486947406.

It is not an unprimeable number, because it can be changed into a prime (31486947451) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 68006135 + ... + 68006597.

Almost surely, 2^31486947458 is an apocalyptic number.

31486947458 is a deficient number, since it is larger than the sum of its proper divisors (16021007329).

31486947458 is an frugal number, since it uses more digits than its factorization.

31486947458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1470 (or 736 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 59.

The spelling of 31486947458 in words is "thirty-one billion, four hundred eighty-six million, nine hundred forty-seven thousand, four hundred fifty-eight".