1361261679 has 8 divisors (see below), whose sum is σ = 1815187632. Its totient is φ = 907421760.

The previous prime is 1361261641. The next prime is 1361261687. The reversal of 1361261679 is 9761621631.

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

It is not a de Polignac number, because 1361261679 - 2²⁵ = 1327707247 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 1361261679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361261609) 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, 43387 + ... + 67859.

It is an arithmetic number, because the mean of its divisors is an integer number (226898454).

Almost surely, 2^1361261679 is an apocalyptic number.

1361261679 is a deficient number, since it is larger than the sum of its proper divisors (453925953).

1361261679 is a wasteful number, since it uses less digits than its factorization.

1361261679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43017.

The product of its digits is 81648, while the sum is 42.

The square root of 1361261679 is about 36895.2799013641. The cubic root of 1361261679 is about 1108.2741567566.

The spelling of 1361261679 in words is "one billion, three hundred sixty-one million, two hundred sixty-one thousand, six hundred seventy-nine".