125493399991 has 8 divisors (see below), whose sum is σ = 132113651120. Its totient is φ = 118874682432.

The previous prime is 125493399979. The next prime is 125493400031. The reversal of 125493399991 is 199993394521.

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 125493399991 - 2⁵ = 125493399959 is a prime.

It is a super-2 number, since 2×125493399991² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125493399931) 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, 213480 + ... + 544573.

It is an arithmetic number, because the mean of its divisors is an integer number (16514206390).

Almost surely, 2^125493399991 is an apocalyptic number.

125493399991 is a deficient number, since it is larger than the sum of its proper divisors (6620251129).

125493399991 is an equidigital number, since it uses as much as digits as its factorization.

125493399991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766785.

The product of its digits is 21257640, while the sum is 64.

The spelling of 125493399991 in words is "one hundred twenty-five billion, four hundred ninety-three million, three hundred ninety-nine thousand, nine hundred ninety-one".