74091694389187 has 4 divisors (see below), whose sum is σ = 75135239380656. Its totient is φ = 73048149397720.

The previous prime is 74091694389131. The next prime is 74091694389257. The reversal of 74091694389187 is 78198349619047.

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

It is a cyclic number.

It is not a de Polignac number, because 74091694389187 - 2²⁷ = 74091560171459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74091694389127) 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, 521772495628 + ... + 521772495769.

It is an arithmetic number, because the mean of its divisors is an integer number (18783809845164).

Almost surely, 2^{74091694389187} is an apocalyptic number.

74091694389187 is a deficient number, since it is larger than the sum of its proper divisors (1043544991469).

74091694389187 is a wasteful number, since it uses less digits than its factorization.

74091694389187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043544991468.

The product of its (nonzero) digits is 658409472, while the sum is 76.

The spelling of 74091694389187 in words is "seventy-four trillion, ninety-one billion, six hundred ninety-four million, three hundred eighty-nine thousand, one hundred eighty-seven".