1261055133400 has 48 divisors (see below), whose sum is σ = 2934847983600. Its totient is φ = 503924023680.

The previous prime is 1261055133337. The next prime is 1261055133413. The reversal of 1261055133400 is 43315501621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2909580 + ... + 3314779.

It is an arithmetic number, because the mean of its divisors is an integer number (61142666325).

Almost surely, 2^{1261055133400} is an apocalyptic number.

1261055133400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1261055133400 is an abundant number, since it is smaller than the sum of its proper divisors (1673792850200).

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

1261055133400 is a wasteful number, since it uses less digits than its factorization.

1261055133400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6225388 (or 6225379 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 1261055133400 in words is "one trillion, two hundred sixty-one billion, fifty-five million, one hundred thirty-three thousand, four hundred".