961364109820 has 24 divisors (see below), whose sum is σ = 2020200805728. Its totient is φ = 384291134400.

The previous prime is 961364109809. The next prime is 961364109889. The reversal of 961364109820 is 28901463169.

It is a happy number.

It is a congruent number.

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, 15875871 + ... + 15936310.

It is an arithmetic number, because the mean of its divisors is an integer number (84175033572).

Almost surely, 2^961364109820 is an apocalyptic number.

It is an amenable number.

961364109820 is an abundant number, since it is smaller than the sum of its proper divisors (1058836695908).

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

961364109820 is a wasteful number, since it uses less digits than its factorization.

961364109820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31813701 (or 31813699 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 961364109820 in words is "nine hundred sixty-one billion, three hundred sixty-four million, one hundred nine thousand, eight hundred twenty".