55743305767721 has 32 divisors (see below), whose sum is σ = 67022352754560. Its totient is φ = 45694754265600.

The previous prime is 55743305767717. The next prime is 55743305767727. The reversal of 55743305767721 is 12776750334755.

It is not a de Polignac number, because 55743305767721 - 2² = 55743305767717 is a prime.

It is a super-2 number, since 2×55743305767721² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55743305767727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25328750 + ... + 27441431.

It is an arithmetic number, because the mean of its divisors is an integer number (2094448523580).

Almost surely, 2^{55743305767721} is an apocalyptic number.

It is an amenable number.

55743305767721 is a deficient number, since it is larger than the sum of its proper divisors (11279046986839).

55743305767721 is a wasteful number, since it uses less digits than its factorization.

55743305767721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52770377.

The product of its (nonzero) digits is 129654000, while the sum is 62.

The spelling of 55743305767721 in words is "fifty-five trillion, seven hundred forty-three billion, three hundred five million, seven hundred sixty-seven thousand, seven hundred twenty-one".