1252777166878 has 16 divisors (see below), whose sum is σ = 1978586853120. Its totient is φ = 593265470616.

The previous prime is 1252777166873. The next prime is 1252777166881. The reversal of 1252777166878 is 8786617772521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252777166873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4166500 + ... + 4457047.

It is an arithmetic number, because the mean of its divisors is an integer number (123661678320).

Almost surely, 2^{1252777166878} is an apocalyptic number.

1252777166878 is a deficient number, since it is larger than the sum of its proper divisors (725809686242).

1252777166878 is a wasteful number, since it uses less digits than its factorization.

1252777166878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8627391.

The product of its digits is 110638080, while the sum is 67.

The spelling of 1252777166878 in words is "one trillion, two hundred fifty-two billion, seven hundred seventy-seven million, one hundred sixty-six thousand, eight hundred seventy-eight".