8261976378 has 16 divisors (see below), whose sum is σ = 17393634720. Its totient is φ = 2609045136.

The previous prime is 8261976367. The next prime is 8261976419. The reversal of 8261976378 is 8736791628.

It is a Harshad number since it is a multiple of its sum of digits (57).

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, 36236625 + ... + 36236852.

It is an arithmetic number, because the mean of its divisors is an integer number (1087102170).

Almost surely, 2^8261976378 is an apocalyptic number.

8261976378 is an abundant number, since it is smaller than the sum of its proper divisors (9131658342).

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

8261976378 is a wasteful number, since it uses less digits than its factorization.

8261976378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72473501.

The product of its digits is 6096384, while the sum is 57.

The square root of 8261976378 is about 90895.4145048033. The cubic root of 8261976378 is about 2021.5973035789.

The spelling of 8261976378 in words is "eight billion, two hundred sixty-one million, nine hundred seventy-six thousand, three hundred seventy-eight".