79778934930 has 64 divisors (see below), whose sum is σ = 199202439168. Its totient is φ = 20425970880.

The previous prime is 79778934929. The next prime is 79778934931. The reversal of 79778934930 is 3943987797.

It is an interprime number because it is at equal distance from previous prime (79778934929) and next prime (79778934931).

It is not an unprimeable number, because it can be changed into a prime (79778934931) 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, 219622 + ... + 455841.

It is an arithmetic number, because the mean of its divisors is an integer number (3112538112).

Almost surely, 2^79778934930 is an apocalyptic number.

79778934930 is an abundant number, since it is smaller than the sum of its proper divisors (119423504238).

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

79778934930 is a wasteful number, since it uses less digits than its factorization.

79778934930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 675631.

The product of its (nonzero) digits is 72013536, while the sum is 66.

The spelling of 79778934930 in words is "seventy-nine billion, seven hundred seventy-eight million, nine hundred thirty-four thousand, nine hundred thirty".