125777387742550 has 24 divisors (see below), whose sum is σ = 234079395979896. Its totient is φ = 50282255144640.

The previous prime is 125777387742499. The next prime is 125777387742557. The reversal of 125777387742550 is 55247783777521.

It is a self number, because there is not a number n which added to its sum of digits gives 125777387742550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125777387742557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 717410284 + ... + 717585583.

It is an arithmetic number, because the mean of its divisors is an integer number (9753308165829).

Almost surely, 2^{125777387742550} is an apocalyptic number.

125777387742550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125777387742550 is a deficient number, since it is larger than the sum of its proper divisors (108302008237346).

125777387742550 is a wasteful number, since it uses less digits than its factorization.

125777387742550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434997632 (or 1434997627 counting only the distinct ones).

The product of its (nonzero) digits is 806736000, while the sum is 70.

The spelling of 125777387742550 in words is "one hundred twenty-five trillion, seven hundred seventy-seven billion, three hundred eighty-seven million, seven hundred forty-two thousand, five hundred fifty".