7857151087 has 4 divisors (see below), whose sum is σ = 7858502560. Its totient is φ = 7855799616.

The previous prime is 7857151079. The next prime is 7857151117. The reversal of 7857151087 is 7801517587.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7857151087 - 2³ = 7857151079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7857151087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7857151007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666978 + ... + 678655.

It is an arithmetic number, because the mean of its divisors is an integer number (1964625640).

Almost surely, 2^7857151087 is an apocalyptic number.

7857151087 is a deficient number, since it is larger than the sum of its proper divisors (1351473).

7857151087 is a wasteful number, since it uses less digits than its factorization.

7857151087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1351472.

The product of its (nonzero) digits is 548800, while the sum is 49.

The square root of 7857151087 is about 88640.5724654348. The cubic root of 7857151087 is about 1988.0243590535.

The spelling of 7857151087 in words is "seven billion, eight hundred fifty-seven million, one hundred fifty-one thousand, eighty-seven".