1258012255500 has 3240 divisors, whose sum is σ = 5865912404352. Its totient is φ = 233513280000.

The previous prime is 1258012255477. The next prime is 1258012255523. The reversal of 1258012255500 is 55522108521.

1258012255500 is a `hidden beast` number, since 1 + 2 + 5 + 80 + 1 + 2 + 25 + 550 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1258012255477) and next prime (1258012255523).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 1079 ways as a sum of consecutive naturals, for example, 40581040485 + ... + 40581040515.

Almost surely, 2^{1258012255500} is an apocalyptic number.

1258012255500 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 1258012255500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2932956202176).

1258012255500 is an abundant number, since it is smaller than the sum of its proper divisors (4607900148852).

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

1258012255500 is a wasteful number, since it uses less digits than its factorization.

1258012255500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 36.

The spelling of 1258012255500 in words is "one trillion, two hundred fifty-eight billion, twelve million, two hundred fifty-five thousand, five hundred".