74521644602 has 4 divisors (see below), whose sum is σ = 111782466906. Its totient is φ = 37260822300.

The previous prime is 74521644563. The next prime is 74521644619. The reversal of 74521644602 is 20644612547.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20644612547 = 13 ⋅1588047119.

It can be written as a sum of positive squares in only one way, i.e., 74485872241 + 35772361 = 272921^2 + 5981^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 74521644602.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18630411149 + ... + 18630411152.

Almost surely, 2^74521644602 is an apocalyptic number.

74521644602 is a deficient number, since it is larger than the sum of its proper divisors (37260822304).

74521644602 is a wasteful number, since it uses less digits than its factorization.

74521644602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37260822303.

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 74521644602 in words is "seventy-four billion, five hundred twenty-one million, six hundred forty-four thousand, six hundred two".