30975556140 has 96 divisors (see below), whose sum is σ = 96735260160. Its totient is φ = 8228703168.

The previous prime is 30975556109. The next prime is 30975556201. The reversal of 30975556140 is 4165557903.

30975556140 is a `hidden beast` number, since 3 + 0 + 97 + 5 + 556 + 1 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32967 + ... + 251073.

It is an arithmetic number, because the mean of its divisors is an integer number (1007658960).

Almost surely, 2^30975556140 is an apocalyptic number.

30975556140 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 30975556140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48367630080).

30975556140 is an abundant number, since it is smaller than the sum of its proper divisors (65759704020).

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

30975556140 is a wasteful number, since it uses less digits than its factorization.

30975556140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218388 (or 218380 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 45.

The spelling of 30975556140 in words is "thirty billion, nine hundred seventy-five million, five hundred fifty-six thousand, one hundred forty".