125772166550 has 12 divisors (see below), whose sum is σ = 233936229876. Its totient is φ = 50308866600.

The previous prime is 125772166549. The next prime is 125772166561. The reversal of 125772166550 is 55661277521.

It is a junction number, because it is equal to n+sod(n) for n = 125772166495 and 125772166504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1257721616 + ... + 1257721715.

It is an arithmetic number, because the mean of its divisors is an integer number (19494685823).

Almost surely, 2^125772166550 is an apocalyptic number.

125772166550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125772166550 is a deficient number, since it is larger than the sum of its proper divisors (108164063326).

125772166550 is a wasteful number, since it uses less digits than its factorization.

125772166550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515443343 (or 2515443338 counting only the distinct ones).

The product of its (nonzero) digits is 882000, while the sum is 47.

The spelling of 125772166550 in words is "one hundred twenty-five billion, seven hundred seventy-two million, one hundred sixty-six thousand, five hundred fifty".