31457685664240 has 160 divisors (see below), whose sum is σ = 81106473139200. Its totient is φ = 11251021916160.

The previous prime is 31457685664211. The next prime is 31457685664289. The reversal of 31457685664240 is 4246658675413.

It is a congruent number.

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, 22380141 + ... + 23744179.

It is an arithmetic number, because the mean of its divisors is an integer number (506915457120).

Almost surely, 2^{31457685664240} 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 31457685664240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40553236569600).

31457685664240 is an abundant number, since it is smaller than the sum of its proper divisors (49648787474960).

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

31457685664240 is a wasteful number, since it uses less digits than its factorization.

31457685664240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364495 (or 1364489 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 61.

The spelling of 31457685664240 in words is "thirty-one trillion, four hundred fifty-seven billion, six hundred eighty-five million, six hundred sixty-four thousand, two hundred forty".