26661143838719 has 8 divisors (see below), whose sum is σ = 28713071458512. Its totient is φ = 24609369133440.

The previous prime is 26661143838697. The next prime is 26661143838781. The reversal of 26661143838719 is 91783834116662.

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

It is not a de Polignac number, because 26661143838719 - 2¹² = 26661143834623 is a prime.

It is a super-2 number, since 2×26661143838719² (a number of 28 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 (26661143838319) 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, 37866377 + ... + 38564034.

It is an arithmetic number, because the mean of its divisors is an integer number (3589133932314).

Almost surely, 2^{26661143838719} is an apocalyptic number.

26661143838719 is a deficient number, since it is larger than the sum of its proper divisors (2051927619793).

26661143838719 is a wasteful number, since it uses less digits than its factorization.

26661143838719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76457257.

The product of its digits is 62705664, while the sum is 65.

The spelling of 26661143838719 in words is "twenty-six trillion, six hundred sixty-one billion, one hundred forty-three million, eight hundred thirty-eight thousand, seven hundred nineteen".