851270078197 has 16 divisors (see below), whose sum is σ = 1061594236800. Its totient is φ = 663158269440.

The previous prime is 851270078173. The next prime is 851270078221. The reversal of 851270078197 is 791870072158.

It is an interprime number because it is at equal distance from previous prime (851270078173) and next prime (851270078221).

It is a cyclic number.

It is not a de Polignac number, because 851270078197 - 2¹⁵ = 851270045429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851270078117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1104372 + ... + 1709437.

It is an arithmetic number, because the mean of its divisors is an integer number (66349639800).

Almost surely, 2^851270078197 is an apocalyptic number.

It is an amenable number.

851270078197 is a deficient number, since it is larger than the sum of its proper divisors (210324158603).

851270078197 is a wasteful number, since it uses less digits than its factorization.

851270078197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817756.

The product of its (nonzero) digits is 1975680, while the sum is 55.

The spelling of 851270078197 in words is "eight hundred fifty-one billion, two hundred seventy million, seventy-eight thousand, one hundred ninety-seven".