14781477890 has 32 divisors (see below), whose sum is σ = 26973218160. Its totient is φ = 5831553024.

The previous prime is 14781477889. The next prime is 14781478003. The reversal of 14781477890 is 9877418741.

It can be written as a sum of positive squares in 8 ways, for example, as 13976677729 + 804800161 = 118223^2 + 28369^2 .

It is a super-2 number, since 2×14781477890² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258206 + ... + 310214.

Almost surely, 2^14781477890 is an apocalyptic number.

14781477890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

14781477890 is a deficient number, since it is larger than the sum of its proper divisors (12191740270).

14781477890 is a wasteful number, since it uses less digits than its factorization.

14781477890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52406.

The product of its (nonzero) digits is 3161088, while the sum is 56.

The spelling of 14781477890 in words is "fourteen billion, seven hundred eighty-one million, four hundred seventy-seven thousand, eight hundred ninety".