125447339951 has 4 divisors (see below), whose sum is σ = 126246367752. Its totient is φ = 124648312152.

The previous prime is 125447339921. The next prime is 125447339977. The reversal of 125447339951 is 159933744521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125447339951 - 2²² = 125443145647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125447339893 and 125447339902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125447339911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399513665 + ... + 399513978.

It is an arithmetic number, because the mean of its divisors is an integer number (31561591938).

Almost surely, 2^125447339951 is an apocalyptic number.

125447339951 is a deficient number, since it is larger than the sum of its proper divisors (799027801).

125447339951 is an equidigital number, since it uses as much as digits as its factorization.

125447339951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799027800.

The product of its digits is 4082400, while the sum is 53.

The spelling of 125447339951 in words is "one hundred twenty-five billion, four hundred forty-seven million, three hundred thirty-nine thousand, nine hundred fifty-one".