1255012400500 has 96 divisors (see below), whose sum is σ = 2800186421760. Its totient is φ = 491162313600.

The previous prime is 1255012400497. The next prime is 1255012400513. The reversal of 1255012400500 is 50042105521.

It is a super-2 number, since 2×1255012400500² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91807666 + ... + 91821334.

It is an arithmetic number, because the mean of its divisors is an integer number (29168608560).

Almost surely, 2^{1255012400500} is an apocalyptic number.

1255012400500 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 1255012400500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1400093210880).

1255012400500 is an abundant number, since it is smaller than the sum of its proper divisors (1545174021260).

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

1255012400500 is a wasteful number, since it uses less digits than its factorization.

1255012400500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17642 (or 17630 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The spelling of 1255012400500 in words is "one trillion, two hundred fifty-five billion, twelve million, four hundred thousand, five hundred".