2569421567138 has 8 divisors (see below), whose sum is σ = 3854195806188. Its totient is φ = 1284689631744.

The previous prime is 2569421567131. The next prime is 2569421567171. The reversal of 2569421567138 is 8317651249652.

It can be written as a sum of positive squares in 2 ways, for example, as 2385489517009 + 183932050129 = 1544503^2 + 428873^2 .

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

It is a super-2 number, since 2×2569421567138² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2569421567131) 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, 10423631 + ... + 10667282.

Almost surely, 2^{2569421567138} is an apocalyptic number.

2569421567138 is a deficient number, since it is larger than the sum of its proper divisors (1284774239050).

2569421567138 is a wasteful number, since it uses less digits than its factorization.

2569421567138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21151828.

The product of its digits is 21772800, while the sum is 59.

The spelling of 2569421567138 in words is "two trillion, five hundred sixty-nine billion, four hundred twenty-one million, five hundred sixty-seven thousand, one hundred thirty-eight".