1000778153800 has 48 divisors (see below), whose sum is σ = 2327020073460. Its totient is φ = 400274983680.

The previous prime is 1000778153797. The next prime is 1000778153801. The reversal of 1000778153800 is 83518770001.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 506650698436 + 494127455364 = 711794^2 + 702942^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (1000778153801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2042322 + ... + 2484478.

Almost surely, 2^{1000778153800} is an apocalyptic number.

1000778153800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000778153800 is an abundant number, since it is smaller than the sum of its proper divisors (1326241919660).

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

1000778153800 is a wasteful number, since it uses less digits than its factorization.

1000778153800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453490 (or 453481 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 40.

The spelling of 1000778153800 in words is "one trillion, seven hundred seventy-eight million, one hundred fifty-three thousand, eight hundred".