74779297747 has 32 divisors (see below), whose sum is σ = 99747187200. Its totient is φ = 54297734400.

The previous prime is 74779297729. The next prime is 74779297759.

74779297747 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 74779297747 - 2²⁷ = 74645080019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74779297847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 329722 + ... + 508207.

It is an arithmetic number, because the mean of its divisors is an integer number (3117099600).

Almost surely, 2^74779297747 is an apocalyptic number.

74779297747 is a gapful number since it is divisible by the number (77) formed by its first and last digit.

74779297747 is a deficient number, since it is larger than the sum of its proper divisors (24967889453).

74779297747 is a wasteful number, since it uses less digits than its factorization.

74779297747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838027.

The product of its digits is 304946208, while the sum is 70.

The spelling of 74779297747 in words is "seventy-four billion, seven hundred seventy-nine million, two hundred ninety-seven thousand, seven hundred forty-seven".