74678523478 has 16 divisors (see below), whose sum is σ = 120704705856. Its totient is φ = 34446962880.

The previous prime is 74678523467. The next prime is 74678523481. The reversal of 74678523478 is 87432587647.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789726 + ... + 879217.

It is an arithmetic number, because the mean of its divisors is an integer number (7544044116).

Almost surely, 2^74678523478 is an apocalyptic number.

74678523478 is a deficient number, since it is larger than the sum of its proper divisors (46026182378).

74678523478 is a wasteful number, since it uses less digits than its factorization.

74678523478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670679.

The product of its digits is 63221760, while the sum is 61.

The spelling of 74678523478 in words is "seventy-four billion, six hundred seventy-eight million, five hundred twenty-three thousand, four hundred seventy-eight".