74286782878 has 32 divisors (see below), whose sum is σ = 139416917760. Its totient is φ = 28840613760.

The previous prime is 74286782861. The next prime is 74286782879. The reversal of 74286782878 is 87828768247.

It is a super-2 number, since 2×74286782878² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74286782879) 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, 808683 + ... + 895846.

It is an arithmetic number, because the mean of its divisors is an integer number (4356778680).

Almost surely, 2^74286782878 is an apocalyptic number.

74286782878 is a deficient number, since it is larger than the sum of its proper divisors (65130134882).

74286782878 is a wasteful number, since it uses less digits than its factorization.

74286782878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704832.

The product of its digits is 134873088, while the sum is 67.

The spelling of 74286782878 in words is "seventy-four billion, two hundred eighty-six million, seven hundred eighty-two thousand, eight hundred seventy-eight".