125405104550 has 192 divisors, whose sum is σ = 282131942400. Its totient is φ = 40972377600.

The previous prime is 125405104499. The next prime is 125405104621. The reversal of 125405104550 is 55401504521.

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, 13568831 + ... + 13578069.

It is an arithmetic number, because the mean of its divisors is an integer number (1469437200).

Almost surely, 2^125405104550 is an apocalyptic number.

125405104550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125405104550 is an abundant number, since it is smaller than the sum of its proper divisors (156726837850).

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

125405104550 is a wasteful number, since it uses less digits than its factorization.

125405104550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9351 (or 9346 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 125405104550 in words is "one hundred twenty-five billion, four hundred five million, one hundred four thousand, five hundred fifty".