23777808978 has 96 divisors (see below), whose sum is σ = 60581606400. Its totient is φ = 6088975200.

The previous prime is 23777808953. The next prime is 23777808979. The reversal of 23777808978 is 87980877732.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (23777808979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 327873 + ... + 393771.

It is an arithmetic number, because the mean of its divisors is an integer number (631058400).

Almost surely, 2^23777808978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23777808978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30290803200).

23777808978 is an abundant number, since it is smaller than the sum of its proper divisors (36803797422).

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

23777808978 is a wasteful number, since it uses less digits than its factorization.

23777808978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66004 (or 65993 counting only the distinct ones).

The product of its (nonzero) digits is 66382848, while the sum is 66.

The spelling of 23777808978 in words is "twenty-three billion, seven hundred seventy-seven million, eight hundred eight thousand, nine hundred seventy-eight".