5455621655781 has 16 divisors (see below), whose sum is σ = 7935605451840. Its totient is φ = 3306372462720.

The previous prime is 5455621655779. The next prime is 5455621655833. The reversal of 5455621655781 is 1875561265545.

It is not a de Polignac number, because 5455621655781 - 2¹ = 5455621655779 is a prime.

It is a super-2 number, since 2×5455621655781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5455621657781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111651 + ... + 3305103.

It is an arithmetic number, because the mean of its divisors is an integer number (495975340740).

Almost surely, 2^{5455621655781} is an apocalyptic number.

It is an amenable number.

5455621655781 is a deficient number, since it is larger than the sum of its proper divisors (2479983796059).

5455621655781 is a wasteful number, since it uses less digits than its factorization.

5455621655781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3245236.

The product of its digits is 50400000, while the sum is 60.

The spelling of 5455621655781 in words is "five trillion, four hundred fifty-five billion, six hundred twenty-one million, six hundred fifty-five thousand, seven hundred eighty-one".