11643765450 has 24 divisors (see below), whose sum is σ = 28876538688. Its totient is φ = 3105004080.

The previous prime is 11643765391. The next prime is 11643765457. The reversal of 11643765450 is 5456734611.

It is a super-2 number, since 2×11643765450² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11643765457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38812402 + ... + 38812701.

It is an arithmetic number, because the mean of its divisors is an integer number (1203189112).

Almost surely, 2^11643765450 is an apocalyptic number.

11643765450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11643765450 is an abundant number, since it is smaller than the sum of its proper divisors (17232773238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11643765450 is a wasteful number, since it uses less digits than its factorization.

11643765450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77625118 (or 77625113 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 11643765450 in words is "eleven billion, six hundred forty-three million, seven hundred sixty-five thousand, four hundred fifty".