254436778654 has 32 divisors (see below), whose sum is σ = 394883629056. Its totient is φ = 122890037760.

The previous prime is 254436778549. The next prime is 254436778681. The reversal of 254436778654 is 456877634452.

It is a junction number, because it is equal to n+sod(n) for n = 254436778592 and 254436778601.

It is a congruent number.

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, 2248819 + ... + 2359249.

It is an arithmetic number, because the mean of its divisors is an integer number (12340113408).

Almost surely, 2^254436778654 is an apocalyptic number.

254436778654 is a deficient number, since it is larger than the sum of its proper divisors (140446850402).

254436778654 is a wasteful number, since it uses less digits than its factorization.

254436778654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110800.

The product of its digits is 135475200, while the sum is 61.

The spelling of 254436778654 in words is "two hundred fifty-four billion, four hundred thirty-six million, seven hundred seventy-eight thousand, six hundred fifty-four".