20780616050128 has 40 divisors (see below), whose sum is σ = 44857190563200. Its totient is φ = 9244761488640.

The previous prime is 20780616050093. The next prime is 20780616050167. The reversal of 20780616050128 is 82105061608702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1256073453 + ... + 1256089996.

It is an arithmetic number, because the mean of its divisors is an integer number (1121429764080).

Almost surely, 2^{20780616050128} is an apocalyptic number.

It is an amenable number.

20780616050128 is an abundant number, since it is smaller than the sum of its proper divisors (24076574513072).

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

20780616050128 is a wasteful number, since it uses less digits than its factorization.

20780616050128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2512163515 (or 2512163509 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 20780616050128 in words is "twenty trillion, seven hundred eighty billion, six hundred sixteen million, fifty thousand, one hundred twenty-eight".