961779962690 has 8 divisors (see below), whose sum is σ = 1731203932860. Its totient is φ = 384711985072.

The previous prime is 961779962683. The next prime is 961779962701. The reversal of 961779962690 is 96269977169.

It can be written as a sum of positive squares in 2 ways, for example, as 955781924881 + 5998037809 = 977641^2 + 77447^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×961779962690² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48088998125 + ... + 48088998144.

Almost surely, 2^961779962690 is an apocalyptic number.

961779962690 is a deficient number, since it is larger than the sum of its proper divisors (769423970170).

961779962690 is a wasteful number, since it uses less digits than its factorization.

961779962690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96177996276.

The product of its (nonzero) digits is 138883248, while the sum is 71.

The spelling of 961779962690 in words is "nine hundred sixty-one billion, seven hundred seventy-nine million, nine hundred sixty-two thousand, six hundred ninety".