31356426601240 has 64 divisors (see below), whose sum is σ = 75987100173600. Its totient is φ = 11576528335872.

The previous prime is 31356426601223. The next prime is 31356426601277. The reversal of 31356426601240 is 4210662465313.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1708891 + ... + 8101429.

Almost surely, 2^{31356426601240} is an apocalyptic number.

It is an amenable number.

31356426601240 is an abundant number, since it is smaller than the sum of its proper divisors (44630673572360).

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

31356426601240 is a wasteful number, since it uses less digits than its factorization.

31356426601240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6401996 (or 6401992 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 31356426601240 in words is "thirty-one trillion, three hundred fifty-six billion, four hundred twenty-six million, six hundred one thousand, two hundred forty".