709297579978 has 16 divisors (see below), whose sum is σ = 1146096645120. Its totient is φ = 327280043376.

The previous prime is 709297579927. The next prime is 709297579987. The reversal of 709297579978 is 879975792907.

709297579978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 709297579898 and 709297579907.

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, 3571050 + ... + 3764437.

It is an arithmetic number, because the mean of its divisors is an integer number (71631040320).

Almost surely, 2^709297579978 is an apocalyptic number.

709297579978 is a deficient number, since it is larger than the sum of its proper divisors (436799065142).

709297579978 is a wasteful number, since it uses less digits than its factorization.

709297579978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7339221.

The product of its (nonzero) digits is 1260236880, while the sum is 79.

The spelling of 709297579978 in words is "seven hundred nine billion, two hundred ninety-seven million, five hundred seventy-nine thousand, nine hundred seventy-eight".