1255577740542 has 48 divisors (see below), whose sum is σ = 2723367563280. Its totient is φ = 418072461696.

The previous prime is 1255577740541. The next prime is 1255577740561. The reversal of 1255577740542 is 2450477755521.

1255577740542 is a `hidden beast` number, since 1 + 2 + 5 + 5 + 57 + 7 + 7 + 40 + 542 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255577740541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71440468 + ... + 71458040.

It is an arithmetic number, because the mean of its divisors is an integer number (56736824235).

Almost surely, 2^{1255577740542} is an apocalyptic number.

1255577740542 is an abundant number, since it is smaller than the sum of its proper divisors (1467789822738).

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

1255577740542 is a wasteful number, since it uses less digits than its factorization.

1255577740542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21657 (or 21654 counting only the distinct ones).

The product of its (nonzero) digits is 13720000, while the sum is 54.

The spelling of 1255577740542 in words is "one trillion, two hundred fifty-five billion, five hundred seventy-seven million, seven hundred forty thousand, five hundred forty-two".