9644991420 has 24 divisors (see below), whose sum is σ = 27005976144. Its totient is φ = 2571997696.

The previous prime is 9644991407. The next prime is 9644991469. The reversal of 9644991420 is 241994469.

It is a self number, because there is not a number n which added to its sum of digits gives 9644991420.

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, 80374869 + ... + 80374988.

It is an arithmetic number, because the mean of its divisors is an integer number (1125249006).

Almost surely, 2^9644991420 is an apocalyptic number.

It is an amenable number.

9644991420 is an abundant number, since it is smaller than the sum of its proper divisors (17360984724).

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

9644991420 is a wasteful number, since it uses less digits than its factorization.

9644991420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160749869 (or 160749867 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 9644991420 is about 98208.9172122369. The cubic root of 9644991420 is about 2128.6321399051.

The spelling of 9644991420 in words is "nine billion, six hundred forty-four million, nine hundred ninety-one thousand, four hundred twenty".