238021710905551 has 8 divisors (see below), whose sum is σ = 238294638548064. Its totient is φ = 237748789512960.

The previous prime is 238021710905543. The next prime is 238021710905597. The reversal of 238021710905551 is 155509017120832.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 238021710905551 - 2³ = 238021710905543 is a prime.

It is a super-2 number, since 2×238021710905551² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 238021710905495 and 238021710905504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238021710905051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76906446 + ... + 79941508.

It is an arithmetic number, because the mean of its divisors is an integer number (29786829818508).

Almost surely, 2^{238021710905551} is an apocalyptic number.

238021710905551 is a deficient number, since it is larger than the sum of its proper divisors (272927642513).

238021710905551 is an equidigital number, since it uses as much as digits as its factorization.

238021710905551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124961.

The product of its (nonzero) digits is 756000, while the sum is 49.

The spelling of 238021710905551 in words is "two hundred thirty-eight trillion, twenty-one billion, seven hundred ten million, nine hundred five thousand, five hundred fifty-one".