31426664478 has 16 divisors (see below), whose sum is σ = 68567268096. Its totient is φ = 9523231640.

The previous prime is 31426664473. The next prime is 31426664557. The reversal of 31426664478 is 87446662413.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31426664478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31426664473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238080726 + ... + 238080857.

It is an arithmetic number, because the mean of its divisors is an integer number (4285454256).

Almost surely, 2^31426664478 is an apocalyptic number.

31426664478 is an abundant number, since it is smaller than the sum of its proper divisors (37140603618).

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

31426664478 is a wasteful number, since it uses less digits than its factorization.

31426664478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476161599.

The product of its digits is 4644864, while the sum is 51.

The spelling of 31426664478 in words is "thirty-one billion, four hundred twenty-six million, six hundred sixty-four thousand, four hundred seventy-eight".