1285974178020 has 360 divisors, whose sum is σ = 4706181688824. Its totient is φ = 293097885696.

The previous prime is 1285974178003. The next prime is 1285974178039. The reversal of 1285974178020 is 208714795821.

1285974178020 is a `hidden beast` number, since 1 + 2 + 8 + 597 + 41 + 7 + 8 + 0 + 2 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 15971398884 + 1270002779136 = 126378^2 + 1126944^2 .

It is a super-2 number, since 2×1285974178020² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 27998194 + ... + 28044086.

Almost surely, 2^{1285974178020} is an apocalyptic number.

1285974178020 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 1285974178020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2353090844412).

1285974178020 is an abundant number, since it is smaller than the sum of its proper divisors (3420207510804).

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

1285974178020 is a wasteful number, since it uses less digits than its factorization.

1285974178020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46281 (or 46263 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 54.

The spelling of 1285974178020 in words is "one trillion, two hundred eighty-five billion, nine hundred seventy-four million, one hundred seventy-eight thousand, twenty".