13805780004 has 27 divisors (see below), whose sum is σ = 34899726043. Its totient is φ = 4601691672.

The previous prime is 13805779973. The next prime is 13805780039. The reversal of 13805780004 is 40008750831.

The square root of 13805780004 is 117498.

It is a perfect power (a square), and thus also a powerful number.

13805780004 is a `hidden beast` number, since 1 + 3 + 80 + 578 + 0 + 0 + 0 + 4 = 666.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 695197 + ... + 714779.

Almost surely, 2^13805780004 is an apocalyptic number.

13805780004 is the 117498-th square number.

It is an amenable number.

13805780004 is an abundant number, since it is smaller than the sum of its proper divisors (21093946039).

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

13805780004 is an frugal number, since it uses more digits than its factorization.

13805780004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39176 (or 19588 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

Multiplying 13805780004 by its sum of digits (36), we get a square (497008080144 = 704988²).

13805780004 divided by its sum of digits (36) gives a square (383493889 = 19583²).

The spelling of 13805780004 in words is "thirteen billion, eight hundred five million, seven hundred eighty thousand, four".