125861193217 has 16 divisors (see below), whose sum is σ = 136512889920. Its totient is φ = 115599712768.

The previous prime is 125861193209. The next prime is 125861193223. The reversal of 125861193217 is 712391168521.

It is not a de Polignac number, because 125861193217 - 2³ = 125861193209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125861193247) 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, 320563 + ... + 595384.

It is an arithmetic number, because the mean of its divisors is an integer number (8532055620).

Almost surely, 2^125861193217 is an apocalyptic number.

125861193217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

125861193217 is a deficient number, since it is larger than the sum of its proper divisors (10651696703).

125861193217 is a wasteful number, since it uses less digits than its factorization.

125861193217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916160.

The product of its digits is 181440, while the sum is 46.

The spelling of 125861193217 in words is "one hundred twenty-five billion, eight hundred sixty-one million, one hundred ninety-three thousand, two hundred seventeen".