1285557880425 has 192 divisors, whose sum is σ = 2782041937920. Its totient is φ = 508622561280.

The previous prime is 1285557880381. The next prime is 1285557880429. The reversal of 1285557880425 is 5240887555821.

It is not a de Polignac number, because 1285557880425 - 2⁶ = 1285557880361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1285557880429) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 12527374 + ... + 12629576.

It is an arithmetic number, because the mean of its divisors is an integer number (14489801760).

Almost surely, 2^{1285557880425} is an apocalyptic number.

1285557880425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1285557880425 is an abundant number, since it is smaller than the sum of its proper divisors (1496484057495).

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

1285557880425 is a wasteful number, since it uses less digits than its factorization.

1285557880425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102352 (or 102347 counting only the distinct ones).

The product of its (nonzero) digits is 35840000, while the sum is 60.

The spelling of 1285557880425 in words is "one trillion, two hundred eighty-five billion, five hundred fifty-seven million, eight hundred eighty thousand, four hundred twenty-five".