11111646001 has 4 divisors (see below), whose sum is σ = 11122219504. Its totient is φ = 11101072500.

The previous prime is 11111645981. The next prime is 11111646011. The reversal of 11111646001 is 10064611111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10064611111 = 59 ⋅170586629.

It is a cyclic number.

It is not a de Polignac number, because 11111646001 - 2¹³ = 11111637809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11111646011) 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, 5285175 + ... + 5287276.

It is an arithmetic number, because the mean of its divisors is an integer number (2780554876).

Almost surely, 2^11111646001 is an apocalyptic number.

It is an amenable number.

11111646001 is a deficient number, since it is larger than the sum of its proper divisors (10573503).

11111646001 is a wasteful number, since it uses less digits than its factorization.

11111646001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10573502.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 11111646001 in words is "eleven billion, one hundred eleven million, six hundred forty-six thousand, one".