2661358136279 has 8 divisors (see below), whose sum is σ = 2662578883440. Its totient is φ = 2660137559296.

The previous prime is 2661358136273. The next prime is 2661358136347. The reversal of 2661358136279 is 9726318531662.

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 2661358136279 - 2¹² = 2661358132183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661358136273) 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, 39324332 + ... + 39391950.

It is an arithmetic number, because the mean of its divisors is an integer number (332822360430).

Almost surely, 2^{2661358136279} is an apocalyptic number.

2661358136279 is a deficient number, since it is larger than the sum of its proper divisors (1220747161).

2661358136279 is a wasteful number, since it uses less digits than its factorization.

2661358136279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85089.

The product of its digits is 19595520, while the sum is 59.

The spelling of 2661358136279 in words is "two trillion, six hundred sixty-one billion, three hundred fifty-eight million, one hundred thirty-six thousand, two hundred seventy-nine".