74491961652 has 18 divisors (see below), whose sum is σ = 188299125378. Its totient is φ = 24830653872.

The previous prime is 74491961647. The next prime is 74491961681. The reversal of 74491961652 is 25616919447.

74491961652 is a `hidden beast` number, since 7 + 4 + 4 + 9 + 19 + 616 + 5 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 74074331556 + 417630096 = 272166^2 + 20436^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1034610543 + ... + 1034610614.

It is an arithmetic number, because the mean of its divisors is an integer number (10461062521).

Almost surely, 2^74491961652 is an apocalyptic number.

It is an amenable number.

74491961652 is an abundant number, since it is smaller than the sum of its proper divisors (113807163726).

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

74491961652 is a wasteful number, since it uses less digits than its factorization.

74491961652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069221167 (or 2069221162 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 74491961652 in words is "seventy-four billion, four hundred ninety-one million, nine hundred sixty-one thousand, six hundred fifty-two".