125561670320 has 40 divisors (see below), whose sum is σ = 291947340960. Its totient is φ = 50221836800.

The previous prime is 125561670317. The next prime is 125561670343. The reversal of 125561670320 is 23076165521.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1932116 + ... + 1996044.

It is an arithmetic number, because the mean of its divisors is an integer number (7298683524).

Almost surely, 2^125561670320 is an apocalyptic number.

125561670320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125561670320 is an abundant number, since it is smaller than the sum of its proper divisors (166385670640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125561670320 is a wasteful number, since it uses less digits than its factorization.

125561670320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88493 (or 88487 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 125561670320 in words is "one hundred twenty-five billion, five hundred sixty-one million, six hundred seventy thousand, three hundred twenty".