125178973920 has 576 divisors, whose sum is σ = 573553903104. Its totient is φ = 24010076160.

The previous prime is 125178973879. The next prime is 125178973937. The reversal of 125178973920 is 29379871521.

It is a happy number.

125178973920 is a `hidden beast` number, since 1 + 2 + 517 + 8 + 97 + 39 + 2 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1398019 + ... + 1484861.

It is an arithmetic number, because the mean of its divisors is an integer number (995753304).

Almost surely, 2^125178973920 is an apocalyptic number.

125178973920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 125178973920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286776951552).

125178973920 is an abundant number, since it is smaller than the sum of its proper divisors (448374929184).

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

125178973920 is a wasteful number, since it uses less digits than its factorization.

125178973920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86895 (or 86884 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 54.

The spelling of 125178973920 in words is "one hundred twenty-five billion, one hundred seventy-eight million, nine hundred seventy-three thousand, nine hundred twenty".