623877778326 has 16 divisors (see below), whose sum is σ = 1361187880128. Its totient is φ = 189053872200.

The previous prime is 623877778219. The next prime is 623877778333.

623877778326 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 9452693611 = 623877778326 / (6 + 2 + 3 + 8 + 7 + 7 + 7 + 7 + 8 + 3 + 2 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4726346740 + ... + 4726346871.

It is an arithmetic number, because the mean of its divisors is an integer number (85074242508).

Almost surely, 2^623877778326 is an apocalyptic number.

623877778326 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

623877778326 is an abundant number, since it is smaller than the sum of its proper divisors (737310101802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

623877778326 is a wasteful number, since it uses less digits than its factorization.

623877778326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9452693627.

The product of its digits is 199148544, while the sum is 66.

The spelling of 623877778326 in words is "six hundred twenty-three billion, eight hundred seventy-seven million, seven hundred seventy-eight thousand, three hundred twenty-six".