125455251440 has 20 divisors (see below), whose sum is σ = 291683459784. Its totient is φ = 50182100544.

The previous prime is 125455251409. The next prime is 125455251491. The reversal of 125455251440 is 44152554521.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×125455251440² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125455251394 and 125455251403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 784095242 + ... + 784095401.

Almost surely, 2^125455251440 is an apocalyptic number.

125455251440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125455251440 is an abundant number, since it is smaller than the sum of its proper divisors (166228208344).

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

125455251440 is a wasteful number, since it uses less digits than its factorization.

125455251440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568190656 (or 1568190650 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 38.

The spelling of 125455251440 in words is "one hundred twenty-five billion, four hundred fifty-five million, two hundred fifty-one thousand, four hundred forty".