74773779373 has 4 divisors (see below), whose sum is σ = 74774374848. Its totient is φ = 74773183900.

The previous prime is 74773779371. The next prime is 74773779389. The reversal of 74773779373 is 37397737747.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 74773779373 - 2¹ = 74773779371 is a prime.

It is a super-2 number, since 2×74773779373² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74773779371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27811 + ... + 387712.

It is an arithmetic number, because the mean of its divisors is an integer number (18693593712).

Almost surely, 2^74773779373 is an apocalyptic number.

It is an amenable number.

74773779373 is a deficient number, since it is larger than the sum of its proper divisors (595475).

74773779373 is a wasteful number, since it uses less digits than its factorization.

74773779373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595474.

The product of its digits is 114354828, while the sum is 64.

The spelling of 74773779373 in words is "seventy-four billion, seven hundred seventy-three million, seven hundred seventy-nine thousand, three hundred seventy-three".