30725721763140 has 96 divisors (see below), whose sum is σ = 88809901092864. Its totient is φ = 7928981585280.

The previous prime is 30725721763133. The next prime is 30725721763141. The reversal of 30725721763140 is 4136712752703.

It is a self number, because there is not a number n which added to its sum of digits gives 30725721763140.

It is not an unprimeable number, because it can be changed into a prime (30725721763141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66930267 + ... + 67387773.

It is an arithmetic number, because the mean of its divisors is an integer number (925103136384).

Almost surely, 2^{30725721763140} is an apocalyptic number.

30725721763140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30725721763140 is an abundant number, since it is smaller than the sum of its proper divisors (58084179329724).

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

30725721763140 is a wasteful number, since it uses less digits than its factorization.

30725721763140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493657 (or 493655 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 48.

The spelling of 30725721763140 in words is "thirty trillion, seven hundred twenty-five billion, seven hundred twenty-one million, seven hundred sixty-three thousand, one hundred forty".