74278351889 has 16 divisors (see below), whose sum is σ = 90256041216. Its totient is φ = 59673369600.

The previous prime is 74278351853. The next prime is 74278351909. The reversal of 74278351889 is 98815387247.

74278351889 is nontrivially palindromic in base 16.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74278351889 is a prime.

It is a super-2 number, since 2×74278351889² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74278357889) 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, 1266317 + ... + 1323674.

It is an arithmetic number, because the mean of its divisors is an integer number (5641002576).

Almost surely, 2^74278351889 is an apocalyptic number.

It is an amenable number.

74278351889 is a deficient number, since it is larger than the sum of its proper divisors (15977689327).

74278351889 is a wasteful number, since it uses less digits than its factorization.

74278351889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2590256.

The product of its digits is 27095040, while the sum is 62.

The spelling of 74278351889 in words is "seventy-four billion, two hundred seventy-eight million, three hundred fifty-one thousand, eight hundred eighty-nine".