1186640738623 has 16 divisors (see below), whose sum is σ = 1267791782400. Its totient is φ = 1107452554560.

The previous prime is 1186640738617. The next prime is 1186640738663. The reversal of 1186640738623 is 3268370466811.

It is a cyclic number.

It is not a de Polignac number, because 1186640738623 - 2⁹ = 1186640738111 is a prime.

It is a super-2 number, since 2×1186640738623² (a number of 25 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 (1186640738663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 836461 + ... + 1752982.

It is an arithmetic number, because the mean of its divisors is an integer number (79236986400).

Almost surely, 2^{1186640738623} is an apocalyptic number.

1186640738623 is a deficient number, since it is larger than the sum of its proper divisors (81151043777).

1186640738623 is a wasteful number, since it uses less digits than its factorization.

1186640738623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2589822.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The spelling of 1186640738623 in words is "one trillion, one hundred eighty-six billion, six hundred forty million, seven hundred thirty-eight thousand, six hundred twenty-three".