7861417540 has 24 divisors (see below), whose sum is σ = 16514691480. Its totient is φ = 3143478528.

The previous prime is 7861417513. The next prime is 7861417547. The reversal of 7861417540 is 457141687.

It can be written as a sum of positive squares in 4 ways, for example, as 2493803844 + 5367613696 = 49938^2 + 73264^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7861417547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7495 + ... + 125614.

It is an arithmetic number, because the mean of its divisors is an integer number (688112145).

Almost surely, 2^7861417540 is an apocalyptic number.

It is an amenable number.

7861417540 is an abundant number, since it is smaller than the sum of its proper divisors (8653273940).

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

7861417540 is a wasteful number, since it uses less digits than its factorization.

7861417540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136071 (or 136069 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 7861417540 is about 88664.6352273554. The cubic root of 7861417540 is about 1988.3841280352.

The spelling of 7861417540 in words is "seven billion, eight hundred sixty-one million, four hundred seventeen thousand, five hundred forty".