8410891978 has 8 divisors (see below), whose sum is σ = 12616731972. Its totient is φ = 4205314656.

The previous prime is 8410891949. The next prime is 8410892093. The reversal of 8410891978 is 8791980148.

It can be written as a sum of positive squares in 2 ways, for example, as 8328935169 + 81956809 = 91263^2 + 9053^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72676 + ... + 148672.

Almost surely, 2^8410891978 is an apocalyptic number.

8410891978 is a deficient number, since it is larger than the sum of its proper divisors (4205839994).

8410891978 is a wasteful number, since it uses less digits than its factorization.

8410891978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131336.

The product of its (nonzero) digits is 1161216, while the sum is 55.

The square root of 8410891978 is about 91710.9152609437. The cubic root of 8410891978 is about 2033.6709505556.

The spelling of 8410891978 in words is "eight billion, four hundred ten million, eight hundred ninety-one thousand, nine hundred seventy-eight".