549739536565920 has 192 divisors, whose sum is σ = 1742655593226240. Its totient is φ = 145670874854400.

The previous prime is 549739536565909. The next prime is 549739536565969. The reversal of 549739536565920 is 29565635937945.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43724905 + ... + 54875735.

It is an arithmetic number, because the mean of its divisors is an integer number (9076331214720).

Almost surely, 2^{549739536565920} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 549739536565920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (871327796613120).

549739536565920 is an abundant number, since it is smaller than the sum of its proper divisors (1192916056660320).

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

549739536565920 is a wasteful number, since it uses less digits than its factorization.

549739536565920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11151499 (or 11151491 counting only the distinct ones).

The product of its (nonzero) digits is 8266860000, while the sum is 78.

The spelling of 549739536565920 in words is "five hundred forty-nine trillion, seven hundred thirty-nine billion, five hundred thirty-six million, five hundred sixty-five thousand, nine hundred twenty".