538721755199 has 4 divisors (see below), whose sum is σ = 539098748760. Its totient is φ = 538344761640.

The previous prime is 538721755177. The next prime is 538721755211. The reversal of 538721755199 is 991557127835.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 991557127835 = 5 ⋅198311425567.

It is a cyclic number.

It is not a de Polignac number, because 538721755199 - 2¹⁶ = 538721689663 is a prime.

It is a super-2 number, since 2×538721755199² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (538721755109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188494637 + ... + 188497494.

It is an arithmetic number, because the mean of its divisors is an integer number (134774687190).

Almost surely, 2^538721755199 is an apocalyptic number.

538721755199 is a deficient number, since it is larger than the sum of its proper divisors (376993561).

538721755199 is a wasteful number, since it uses less digits than its factorization.

538721755199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376993560.

The product of its digits is 23814000, while the sum is 62.

The spelling of 538721755199 in words is "five hundred thirty-eight billion, seven hundred twenty-one million, seven hundred fifty-five thousand, one hundred ninety-nine".