125245720637 has 12 divisors (see below), whose sum is σ = 129757744116. Its totient is φ = 120885623040.

The previous prime is 125245720609. The next prime is 125245720673. The reversal of 125245720637 is 736027542521.

It can be written as a sum of positive squares in 6 ways, for example, as 25649303716 + 99596416921 = 160154^2 + 315589^2 .

It is not a de Polignac number, because 125245720637 - 2⁸ = 125245720381 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125245320637) 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 11 ways as a sum of consecutive naturals, for example, 2600903 + ... + 2648619.

It is an arithmetic number, because the mean of its divisors is an integer number (10813145343).

Almost surely, 2^125245720637 is an apocalyptic number.

It is an amenable number.

125245720637 is a deficient number, since it is larger than the sum of its proper divisors (4512023479).

125245720637 is an equidigital number, since it uses as much as digits as its factorization.

125245720637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50896 (or 50867 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 44.

The spelling of 125245720637 in words is "one hundred twenty-five billion, two hundred forty-five million, seven hundred twenty thousand, six hundred thirty-seven".