55739733781 has 32 divisors (see below), whose sum is σ = 60389683200. Its totient is φ = 51290029440.

The previous prime is 55739733733. The next prime is 55739733793. The reversal of 55739733781 is 18733793755.

It is a cyclic number.

It is not a de Polignac number, because 55739733781 - 2¹³ = 55739725589 is a prime.

It is a super-3 number, since 3×55739733781³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55739733481) 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, 25254780 + ... + 25256986.

It is an arithmetic number, because the mean of its divisors is an integer number (1887177600).

Almost surely, 2^55739733781 is an apocalyptic number.

It is an amenable number.

55739733781 is a deficient number, since it is larger than the sum of its proper divisors (4649949419).

55739733781 is a wasteful number, since it uses less digits than its factorization.

55739733781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2569.

The product of its digits is 16669800, while the sum is 58.

The spelling of 55739733781 in words is "fifty-five billion, seven hundred thirty-nine million, seven hundred thirty-three thousand, seven hundred eighty-one".