74771447420 has 48 divisors (see below), whose sum is σ = 160683264000. Its totient is φ = 29213381184.

The previous prime is 74771447411. The next prime is 74771447473. The reversal of 74771447420 is 2474417747.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389357 + ... + 548763.

It is an arithmetic number, because the mean of its divisors is an integer number (3347568000).

Almost surely, 2^74771447420 is an apocalyptic number.

It is an amenable number.

74771447420 is an abundant number, since it is smaller than the sum of its proper divisors (85911816580).

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

74771447420 is a wasteful number, since it uses less digits than its factorization.

74771447420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159962 (or 159960 counting only the distinct ones).

The product of its (nonzero) digits is 1229312, while the sum is 47.

The spelling of 74771447420 in words is "seventy-four billion, seven hundred seventy-one million, four hundred forty-seven thousand, four hundred twenty".