74640771437 has 4 divisors (see below), whose sum is σ = 74953076160. Its totient is φ = 74328466716.

The previous prime is 74640771431. The next prime is 74640771463. The reversal of 74640771437 is 73417704647.

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 74640771437 - 2¹⁴ = 74640755053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74640771431) 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, 156152003 + ... + 156152480.

It is an arithmetic number, because the mean of its divisors is an integer number (18738269040).

Almost surely, 2^74640771437 is an apocalyptic number.

It is an amenable number.

74640771437 is a deficient number, since it is larger than the sum of its proper divisors (312304723).

74640771437 is a wasteful number, since it uses less digits than its factorization.

74640771437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312304722.

The product of its (nonzero) digits is 2765952, while the sum is 50.

The spelling of 74640771437 in words is "seventy-four billion, six hundred forty million, seven hundred seventy-one thousand, four hundred thirty-seven".