74686863691 has 8 divisors (see below), whose sum is σ = 86269318704. Its totient is φ = 63903198720.

The previous prime is 74686863683. The next prime is 74686863709. The reversal of 74686863691 is 19636868647.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74686863691 - 2³ = 74686863683 is a prime.

It is a super-4 number, since 4×74686863691⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74686863611) 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 7 ways as a sum of consecutive naturals, for example, 199697310 + ... + 199697683.

It is an arithmetic number, because the mean of its divisors is an integer number (10783664838).

Almost surely, 2^74686863691 is an apocalyptic number.

74686863691 is a deficient number, since it is larger than the sum of its proper divisors (11582455013).

74686863691 is a wasteful number, since it uses less digits than its factorization.

74686863691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399395021.

The product of its digits is 62705664, while the sum is 64.

The spelling of 74686863691 in words is "seventy-four billion, six hundred eighty-six million, eight hundred sixty-three thousand, six hundred ninety-one".