7923964779402 has 128 divisors (see below), whose sum is σ = 18393777561600. Its totient is φ = 2228932532736.

The previous prime is 7923964779389. The next prime is 7923964779427. The reversal of 7923964779402 is 2049774693297.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1945484038 + ... + 1945488110.

It is an arithmetic number, because the mean of its divisors is an integer number (143701387200).

Almost surely, 2^{7923964779402} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7923964779402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9196888780800).

7923964779402 is an abundant number, since it is smaller than the sum of its proper divisors (10469812782198).

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

7923964779402 is a wasteful number, since it uses less digits than its factorization.

7923964779402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5700.

The product of its (nonzero) digits is 288054144, while the sum is 69.

The spelling of 7923964779402 in words is "seven trillion, nine hundred twenty-three billion, nine hundred sixty-four million, seven hundred seventy-nine thousand, four hundred two".