8906978745 has 192 divisors, whose sum is σ = 19511132160. Its totient is φ = 3667161600.

The previous prime is 8906978741. The next prime is 8906978747. The reversal of 8906978745 is 5478796098.

It is not a de Polignac number, because 8906978745 - 2² = 8906978741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (8906978741) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 11317242 + ... + 11318028.

It is an arithmetic number, because the mean of its divisors is an integer number (101620480).

Almost surely, 2^8906978745 is an apocalyptic number.

It is an amenable number.

8906978745 is an abundant number, since it is smaller than the sum of its proper divisors (10604153415).

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

8906978745 is a wasteful number, since it uses less digits than its factorization.

8906978745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916 (or 913 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 63.

The square root of 8906978745 is about 94376.7913472375. The cubic root of 8906978745 is about 2072.8926198338.

The spelling of 8906978745 in words is "eight billion, nine hundred six million, nine hundred seventy-eight thousand, seven hundred forty-five".