858551055551 has 8 divisors (see below), whose sum is σ = 982268897280. Its totient is φ = 735100136568.

The previous prime is 858551055541. The next prime is 858551055589. The reversal of 858551055551 is 155550155858.

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

It is not a de Polignac number, because 858551055551 - 2²² = 858546861247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 858551055493 and 858551055502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858551055511) 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, 66723791 + ... + 66736656.

It is an arithmetic number, because the mean of its divisors is an integer number (122783612160).

Almost surely, 2^858551055551 is an apocalyptic number.

858551055551 is a deficient number, since it is larger than the sum of its proper divisors (123717841729).

858551055551 is a wasteful number, since it uses less digits than its factorization.

858551055551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133461373.

The product of its (nonzero) digits is 5000000, while the sum is 53.

The spelling of 858551055551 in words is "eight hundred fifty-eight billion, five hundred fifty-one million, fifty-five thousand, five hundred fifty-one".