31577999040 has 1260 divisors, whose sum is σ = 139502363616. Its totient is φ = 6757115904.

The previous prime is 31577999027. The next prime is 31577999081. The reversal of 31577999040 is 4099977513.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (1260).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 671872297 + ... + 671872343.

Almost surely, 2^31577999040 is an apocalyptic number.

31577999040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31577999040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69751181808).

31577999040 is an abundant number, since it is smaller than the sum of its proper divisors (107924364576).

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

31577999040 is a wasteful number, since it uses less digits than its factorization.

31577999040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 2143260, while the sum is 54.

The spelling of 31577999040 in words is "thirty-one billion, five hundred seventy-seven million, nine hundred ninety-nine thousand, forty".