74215429812 has 18 divisors (see below), whose sum is σ = 187600114338. Its totient is φ = 24738476592.

The previous prime is 74215429811. The next prime is 74215429831. The reversal of 74215429812 is 21892451247.

74215429812 is a `hidden beast` number, since 7 + 4 + 2 + 1 + 542 + 98 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 74172343716 + 43086096 = 272346^2 + 6564^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74215429811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1030769823 + ... + 1030769894.

Almost surely, 2^74215429812 is an apocalyptic number.

It is an amenable number.

74215429812 is an abundant number, since it is smaller than the sum of its proper divisors (113384684526).

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

74215429812 is a wasteful number, since it uses less digits than its factorization.

74215429812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061539727 (or 2061539722 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The spelling of 74215429812 in words is "seventy-four billion, two hundred fifteen million, four hundred twenty-nine thousand, eight hundred twelve".