979811477770 has 16 divisors (see below), whose sum is σ = 1767519881928. Its totient is φ = 391066986240.

The previous prime is 979811477657. The next prime is 979811477773. The reversal of 979811477770 is 77774118979.

It can be written as a sum of positive squares in 4 ways, for example, as 702976602969 + 276834874801 = 838437^2 + 526151^2 .

It is a junction number, because it is equal to n+sod(n) for n = 979811477696 and 979811477705.

It is not an unprimeable number, because it can be changed into a prime (979811477773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107195811 + ... + 107204950.

Almost surely, 2^979811477770 is an apocalyptic number.

979811477770 is a deficient number, since it is larger than the sum of its proper divisors (787708404158).

979811477770 is a wasteful number, since it uses less digits than its factorization.

979811477770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214401225.

The product of its (nonzero) digits is 43563744, while the sum is 67.

It can be divided in two parts, 97981 and 1477770, that added together give a palindrome (1575751).

The spelling of 979811477770 in words is "nine hundred seventy-nine billion, eight hundred eleven million, four hundred seventy-seven thousand, seven hundred seventy".