74251247541 has 4 divisors (see below), whose sum is σ = 99001663392. Its totient is φ = 49500831692.

The previous prime is 74251247537. The next prime is 74251247561. The reversal of 74251247541 is 14574215247.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74251247541 - 2² = 74251247537 is a prime.

It is a super-2 number, since 2×74251247541² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74251247493 and 74251247502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74251247561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12375207921 + ... + 12375207926.

It is an arithmetic number, because the mean of its divisors is an integer number (24750415848).

Almost surely, 2^74251247541 is an apocalyptic number.

It is an amenable number.

74251247541 is a deficient number, since it is larger than the sum of its proper divisors (24750415851).

74251247541 is a wasteful number, since it uses less digits than its factorization.

74251247541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24750415850.

The product of its digits is 313600, while the sum is 42.

The spelling of 74251247541 in words is "seventy-four billion, two hundred fifty-one million, two hundred forty-seven thousand, five hundred forty-one".