870808551 has 8 divisors (see below), whose sum is σ = 1222187520. Its totient is φ = 549984312.

The previous prime is 870808541. The next prime is 870808583. The reversal of 870808551 is 155808078.

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

It is not a de Polignac number, because 870808551 - 2⁶ = 870808487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870808541) 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, 7638615 + ... + 7638728.

It is an arithmetic number, because the mean of its divisors is an integer number (152773440).

Almost surely, 2^870808551 is an apocalyptic number.

870808551 is a deficient number, since it is larger than the sum of its proper divisors (351378969).

870808551 is a wasteful number, since it uses less digits than its factorization.

870808551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15277365.

The product of its (nonzero) digits is 89600, while the sum is 42.

The square root of 870808551 is about 29509.4654475475. The cubic root of 870808551 is about 954.9359170472.

The spelling of 870808551 in words is "eight hundred seventy million, eight hundred eight thousand, five hundred fifty-one".