1255500231040 has 128 divisors (see below), whose sum is σ = 3288589956000. Its totient is φ = 454551306240.

The previous prime is 1255500231023. The next prime is 1255500231071. The reversal of 1255500231040 is 401320055521.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1222776 + ... + 2001544.

Almost surely, 2^{1255500231040} is an apocalyptic number.

1255500231040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1255500231040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1644294978000).

1255500231040 is an abundant number, since it is smaller than the sum of its proper divisors (2033089724960).

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

1255500231040 is a wasteful number, since it uses less digits than its factorization.

1255500231040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779028 (or 779016 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 1255500231040 its reverse (401320055521), we get a palindrome (1656820286561).

The spelling of 1255500231040 in words is "one trillion, two hundred fifty-five billion, five hundred million, two hundred thirty-one thousand, forty".