30745620738 has 64 divisors (see below), whose sum is σ = 78269994240. Its totient is φ = 8763552000.

The previous prime is 30745620679. The next prime is 30745620739. The reversal of 30745620738 is 83702654703.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30745620693 and 30745620702.

It is not an unprimeable number, because it can be changed into a prime (30745620739) 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, 62538 + ... + 255738.

It is an arithmetic number, because the mean of its divisors is an integer number (1222968660).

Almost surely, 2^30745620738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30745620738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39134997120).

30745620738 is an abundant number, since it is smaller than the sum of its proper divisors (47524373502).

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

30745620738 is a wasteful number, since it uses less digits than its factorization.

30745620738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193640 (or 193634 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 45.

The spelling of 30745620738 in words is "thirty billion, seven hundred forty-five million, six hundred twenty thousand, seven hundred thirty-eight".