861208091137 has 8 divisors (see below), whose sum is σ = 862336724480. Its totient is φ = 860079623760.

The previous prime is 861208091123. The next prime is 861208091171. The reversal of 861208091137 is 731190802168.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 861208091137 - 2³⁹ = 311452277249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861208091537) 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, 12994039 + ... + 13060147.

It is an arithmetic number, because the mean of its divisors is an integer number (107792090560).

Almost surely, 2^861208091137 is an apocalyptic number.

It is an amenable number.

861208091137 is a deficient number, since it is larger than the sum of its proper divisors (1128633343).

861208091137 is a wasteful number, since it uses less digits than its factorization.

861208091137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82983.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 861208091137 in words is "eight hundred sixty-one billion, two hundred eight million, ninety-one thousand, one hundred thirty-seven".