801851971597 has 4 divisors (see below), whose sum is σ = 815442683040. Its totient is φ = 788261260156.

The previous prime is 801851971579. The next prime is 801851971607. The reversal of 801851971597 is 795179158108.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 801851971597 - 2²³ = 801843582989 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 (801851071597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6795355633 + ... + 6795355750.

It is an arithmetic number, because the mean of its divisors is an integer number (203860670760).

Almost surely, 2^801851971597 is an apocalyptic number.

It is an amenable number.

801851971597 is a deficient number, since it is larger than the sum of its proper divisors (13590711443).

801851971597 is a wasteful number, since it uses less digits than its factorization.

801851971597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13590711442.

The product of its (nonzero) digits is 6350400, while the sum is 61.

The spelling of 801851971597 in words is "eight hundred one billion, eight hundred fifty-one million, nine hundred seventy-one thousand, five hundred ninety-seven".