8621778624 has 112 divisors (see below), whose sum is σ = 23072628480. Its totient is φ = 2841246720.

The previous prime is 8621778617. The next prime is 8621778629. The reversal of 8621778624 is 4268771268.

It is not an unprimeable number, because it can be changed into a prime (8621778629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9381237 + ... + 9382155.

Almost surely, 2^8621778624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8621778624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11536314240).

8621778624 is an abundant number, since it is smaller than the sum of its proper divisors (14450849856).

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

8621778624 is a wasteful number, since it uses less digits than its factorization.

8621778624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1438 (or 1428 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 51.

The square root of 8621778624 is about 92853.5331799496. The cubic root of 8621778624 is about 2050.5276154533.

The spelling of 8621778624 in words is "eight billion, six hundred twenty-one million, seven hundred seventy-eight thousand, six hundred twenty-four".