10781553312 has 36 divisors (see below), whose sum is σ = 30660043050. Its totient is φ = 3593851008.

The previous prime is 10781553311. The next prime is 10781553319. The reversal of 10781553312 is 21335518701.

It is a happy number.

10781553312 is a `hidden beast` number, since 1 + 0 + 78 + 1 + 553 + 31 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7964491536 + 2817061776 = 89244^2 + 53076^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is not an unprimeable number, because it can be changed into a prime (10781553311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18717687 + ... + 18718262.

Almost surely, 2^10781553312 is an apocalyptic number.

10781553312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

10781553312 is an abundant number, since it is smaller than the sum of its proper divisors (19878489738).

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

10781553312 is a wasteful number, since it uses less digits than its factorization.

10781553312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37435965 (or 37435954 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 10781553312 in words is "ten billion, seven hundred eighty-one million, five hundred fifty-three thousand, three hundred twelve".