73778834923 has 4 divisors (see below), whose sum is σ = 73781519760. Its totient is φ = 73776150088.

The previous prime is 73778834911. The next prime is 73778834971. The reversal of 73778834923 is 32943887737.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 73778834923 - 2⁵ = 73778834891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73778334923) 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, 1300768 + ... + 1356301.

It is an arithmetic number, because the mean of its divisors is an integer number (18445379940).

Almost surely, 2^73778834923 is an apocalyptic number.

73778834923 is a deficient number, since it is larger than the sum of its proper divisors (2684837).

73778834923 is a wasteful number, since it uses less digits than its factorization.

73778834923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684836.

The product of its digits is 42674688, while the sum is 61.

The spelling of 73778834923 in words is "seventy-three billion, seven hundred seventy-eight million, eight hundred thirty-four thousand, nine hundred twenty-three".