74657641949 has 24 divisors (see below), whose sum is σ = 88358352768. Its totient is φ = 62518960640.

The previous prime is 74657641939. The next prime is 74657641973. The reversal of 74657641949 is 94914675647.

It is not a de Polignac number, because 74657641949 - 2⁸ = 74657641693 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 74657641891 and 74657641900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74657641939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100424 + ... + 399249.

It is an arithmetic number, because the mean of its divisors is an integer number (3681598032).

Almost surely, 2^74657641949 is an apocalyptic number.

It is an amenable number.

74657641949 is a deficient number, since it is larger than the sum of its proper divisors (13700710819).

74657641949 is a wasteful number, since it uses less digits than its factorization.

74657641949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499765 (or 499748 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 62.

The spelling of 74657641949 in words is "seventy-four billion, six hundred fifty-seven million, six hundred forty-one thousand, nine hundred forty-nine".