1955201916728 has 16 divisors (see below), whose sum is σ = 3666380861760. Its totient is φ = 977500353600.

The previous prime is 1955201916713. The next prime is 1955201916737. The reversal of 1955201916728 is 8276191025591.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12492968 + ... + 12648503.

It is an arithmetic number, because the mean of its divisors is an integer number (229148803860).

Almost surely, 2^{1955201916728} is an apocalyptic number.

It is an amenable number.

1955201916728 is a deficient number, since it is larger than the sum of its proper divisors (1711178945032).

1955201916728 is a wasteful number, since it uses less digits than its factorization.

1955201916728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25151198 (or 25151194 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 56.

The spelling of 1955201916728 in words is "one trillion, nine hundred fifty-five billion, two hundred one million, nine hundred sixteen thousand, seven hundred twenty-eight".