31740755840 has 64 divisors (see below), whose sum is σ = 76066398000. Its totient is φ = 12665155584.

The previous prime is 31740755807. The next prime is 31740755869. The reversal of 31740755840 is 4855704713.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 31740755791 and 31740755800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201131 + ... + 322389.

Almost surely, 2^31740755840 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 31740755840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38033199000).

31740755840 is an abundant number, since it is smaller than the sum of its proper divisors (44325642160).

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

31740755840 is a wasteful number, since it uses less digits than its factorization.

31740755840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121687 (or 121675 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 44.

The spelling of 31740755840 in words is "thirty-one billion, seven hundred forty million, seven hundred fifty-five thousand, eight hundred forty".