74736649755 has 64 divisors (see below), whose sum is σ = 141026486400. Its totient is φ = 37422673920.

The previous prime is 74736649747. The next prime is 74736649759. The reversal of 74736649755 is 55794663747.

It is a happy number.

74736649755 is a `hidden beast` number, since 74 + 73 + 6 + 6 + 497 + 5 + 5 = 666.

It is not a de Polignac number, because 74736649755 - 2³ = 74736649747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74736649692 and 74736649701.

It is not an unprimeable number, because it can be changed into a prime (74736649759) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 898845 + ... + 978465.

It is an arithmetic number, because the mean of its divisors is an integer number (2203538850).

Almost surely, 2^74736649755 is an apocalyptic number.

74736649755 is a deficient number, since it is larger than the sum of its proper divisors (66289836645).

74736649755 is a wasteful number, since it uses less digits than its factorization.

74736649755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80061 (or 80055 counting only the distinct ones).

The product of its digits is 133358400, while the sum is 63.

The spelling of 74736649755 in words is "seventy-four billion, seven hundred thirty-six million, six hundred forty-nine thousand, seven hundred fifty-five".