74512621541 has 4 divisors (see below), whose sum is σ = 74577247692. Its totient is φ = 74447995392.

The previous prime is 74512621529. The next prime is 74512621559. The reversal of 74512621541 is 14512621547.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63955881025 + 10556740516 = 252895^2 + 102746^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74512621541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74512621495 and 74512621504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74512021541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32311346 + ... + 32313651.

It is an arithmetic number, because the mean of its divisors is an integer number (18644311923).

Almost surely, 2^74512621541 is an apocalyptic number.

It is an amenable number.

74512621541 is a deficient number, since it is larger than the sum of its proper divisors (64626151).

74512621541 is a wasteful number, since it uses less digits than its factorization.

74512621541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64626150.

The product of its digits is 67200, while the sum is 38.

It can be divided in two parts, 745126 and 21541, that added together give a palindrome (766667).

The spelling of 74512621541 in words is "seventy-four billion, five hundred twelve million, six hundred twenty-one thousand, five hundred forty-one".