74771639137 has 16 divisors (see below), whose sum is σ = 80847220608. Its totient is φ = 68742576000.

The previous prime is 74771639093. The next prime is 74771639149. The reversal of 74771639137 is 73193617747.

It is a cyclic number.

It is not a de Polignac number, because 74771639137 - 2⁷ = 74771639009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74771639167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10676637 + ... + 10683637.

It is an arithmetic number, because the mean of its divisors is an integer number (5052951288).

Almost surely, 2^74771639137 is an apocalyptic number.

It is an amenable number.

74771639137 is a deficient number, since it is larger than the sum of its proper divisors (6075581471).

74771639137 is a wasteful number, since it uses less digits than its factorization.

74771639137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10200.

The product of its digits is 4667544, while the sum is 55.

The spelling of 74771639137 in words is "seventy-four billion, seven hundred seventy-one million, six hundred thirty-nine thousand, one hundred thirty-seven".