30783213679640 has 32 divisors (see below), whose sum is σ = 69262416522000. Its totient is φ = 12313252450944.

The previous prime is 30783213679639. The next prime is 30783213679657. The reversal of 30783213679640 is 4697631238703.

It is a self number, because there is not a number n which added to its sum of digits gives 30783213679640.

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, 18753926 + ... + 20329194.

Almost surely, 2^{30783213679640} is an apocalyptic number.

It is an amenable number.

30783213679640 is an abundant number, since it is smaller than the sum of its proper divisors (38479202842360).

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

30783213679640 is a wasteful number, since it uses less digits than its factorization.

30783213679640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2063819 (or 2063815 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 59.

The spelling of 30783213679640 in words is "thirty trillion, seven hundred eighty-three billion, two hundred thirteen million, six hundred seventy-nine thousand, six hundred forty".