9777861841600 has 42 divisors (see below), whose sum is σ = 24059651297924. Its totient is φ = 3911144736000.

The previous prime is 9777861841589. The next prime is 9777861841603. The reversal of 9777861841600 is 61481687779.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is not an unprimeable number, because it can be changed into a prime (9777861841603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3055580226 + ... + 3055583425.

Almost surely, 2^{9777861841600} is an apocalyptic number.

It is an amenable number.

9777861841600 is an abundant number, since it is smaller than the sum of its proper divisors (14281789456324).

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

9777861841600 is a wasteful number, since it uses less digits than its factorization.

9777861841600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6111163673 (or 6111163658 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 64.

The spelling of 9777861841600 in words is "nine trillion, seven hundred seventy-seven billion, eight hundred sixty-one million, eight hundred forty-one thousand, six hundred".