1365660425638 has 16 divisors (see below), whose sum is σ = 2169039294144. Its totient is φ = 642649150080.

The previous prime is 1365660425611. The next prime is 1365660425639. The reversal of 1365660425638 is 8365240665631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1365660425639) 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, 1146808 + ... + 2011588.

It is an arithmetic number, because the mean of its divisors is an integer number (135564955884).

Almost surely, 2^{1365660425638} is an apocalyptic number.

1365660425638 is a deficient number, since it is larger than the sum of its proper divisors (803378868506).

1365660425638 is a wasteful number, since it uses less digits than its factorization.

1365660425638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911247.

The product of its (nonzero) digits is 18662400, while the sum is 55.

The spelling of 1365660425638 in words is "one trillion, three hundred sixty-five billion, six hundred sixty million, four hundred twenty-five thousand, six hundred thirty-eight".