74621031505 has 4 divisors (see below), whose sum is σ = 89545237812. Its totient is φ = 59696825200.

The previous prime is 74621031481. The next prime is 74621031533. The reversal of 74621031505 is 50513012647.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50513012647 = 19 ⋅2658579613.

It can be written as a sum of positive squares in 2 ways, for example, as 51682111569 + 22938919936 = 227337^2 + 151456^2 .

It is not a de Polignac number, because 74621031505 - 2³³ = 66031096913 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7462103146 + ... + 7462103155.

It is an arithmetic number, because the mean of its divisors is an integer number (22386309453).

Almost surely, 2^74621031505 is an apocalyptic number.

It is an amenable number.

74621031505 is a deficient number, since it is larger than the sum of its proper divisors (14924206307).

74621031505 is a wasteful number, since it uses less digits than its factorization.

74621031505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14924206306.

The product of its (nonzero) digits is 25200, while the sum is 34.

The spelling of 74621031505 in words is "seventy-four billion, six hundred twenty-one million, thirty-one thousand, five hundred five".