77321270394 has 24 divisors (see below), whose sum is σ = 167736022272. Its totient is φ = 25741971720.

The previous prime is 77321270347. The next prime is 77321270417. The reversal of 77321270394 is 49307212377.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2633754 + ... + 2662949.

It is an arithmetic number, because the mean of its divisors is an integer number (6989000928).

Almost surely, 2^77321270394 is an apocalyptic number.

77321270394 is an abundant number, since it is smaller than the sum of its proper divisors (90414751878).

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

77321270394 is a wasteful number, since it uses less digits than its factorization.

77321270394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5297522 (or 5297519 counting only the distinct ones).

The product of its (nonzero) digits is 444528, while the sum is 45.

The spelling of 77321270394 in words is "seventy-seven billion, three hundred twenty-one million, two hundred seventy thousand, three hundred ninety-four".