7862144634 has 60 divisors (see below), whose sum is σ = 18593178714. Its totient is φ = 2482764048.

The previous prime is 7862144623. The next prime is 7862144659. The reversal of 7862144634 is 4364412687.

7862144634 is a `hidden beast` number, since 7 + 8 + 6 + 2 + 1 + 4 + 4 + 634 = 666.

It can be written as a sum of positive squares in only one way, i.e., 6106953609 + 1755191025 = 78147^2 + 41895^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7862144634.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 8737 + ... + 125700.

Almost surely, 2^7862144634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7862144634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9296589357).

7862144634 is an abundant number, since it is smaller than the sum of its proper divisors (10731034080).

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

7862144634 is a wasteful number, since it uses less digits than its factorization.

7862144634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134489 (or 134461 counting only the distinct ones).

The product of its digits is 774144, while the sum is 45.

The square root of 7862144634 is about 88668.7353806289. The cubic root of 7862144634 is about 1988.4454273108.

The spelling of 7862144634 in words is "seven billion, eight hundred sixty-two million, one hundred forty-four thousand, six hundred thirty-four".