11638405763 has 4 divisors (see below), whose sum is σ = 11640856080. Its totient is φ = 11635955448.

The previous prime is 11638405703. The next prime is 11638405769. The reversal of 11638405763 is 36750483611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36750483611 = 11059 ⋅3323129.

It is a cyclic number.

It is not a de Polignac number, because 11638405763 - 2⁶ = 11638405699 is a prime.

It is a super-2 number, since 2×11638405763² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11638405769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1218020 + ... + 1227537.

It is an arithmetic number, because the mean of its divisors is an integer number (2910214020).

Almost surely, 2^11638405763 is an apocalyptic number.

11638405763 is a deficient number, since it is larger than the sum of its proper divisors (2450317).

11638405763 is an equidigital number, since it uses as much as digits as its factorization.

11638405763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2450316.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 11638405763 in words is "eleven billion, six hundred thirty-eight million, four hundred five thousand, seven hundred sixty-three".