74821647894 has 48 divisors (see below), whose sum is σ = 174312839088. Its totient is φ = 21348387648.

The previous prime is 74821647869. The next prime is 74821647991. The reversal of 74821647894 is 49874612847.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41904 + ... + 389100.

It is an arithmetic number, because the mean of its divisors is an integer number (3631517481).

Almost surely, 2^74821647894 is an apocalyptic number.

74821647894 is an abundant number, since it is smaller than the sum of its proper divisors (99491191194).

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

74821647894 is a wasteful number, since it uses less digits than its factorization.

74821647894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347949 (or 347942 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 60.

The spelling of 74821647894 in words is "seventy-four billion, eight hundred twenty-one million, six hundred forty-seven thousand, eight hundred ninety-four".