74771447421 has 16 divisors (see below), whose sum is σ = 108763502400. Its totient is φ = 45313931520.

The previous prime is 74771447411. The next prime is 74771447473. The reversal of 74771447421 is 12474417747.

It is not a de Polignac number, because 74771447421 - 2⁵ = 74771447389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74771447411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 967611 + ... + 1042023.

It is an arithmetic number, because the mean of its divisors is an integer number (6797718900).

Almost surely, 2^74771447421 is an apocalyptic number.

It is an amenable number.

74771447421 is a deficient number, since it is larger than the sum of its proper divisors (33992054979).

74771447421 is a wasteful number, since it uses less digits than its factorization.

74771447421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104876.

The product of its digits is 1229312, while the sum is 48.

The spelling of 74771447421 in words is "seventy-four billion, seven hundred seventy-one million, four hundred forty-seven thousand, four hundred twenty-one".