11451511010161 has 4 divisors (see below), whose sum is σ = 11451668715072. Its totient is φ = 11451353305252.

The previous prime is 11451511010131. The next prime is 11451511010171. The reversal of 11451511010161 is 16101011515411.

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.

It is a cyclic number.

It is not a de Polignac number, because 11451511010161 - 2⁵ = 11451511010129 is a prime.

It is a super-2 number, since 2×11451511010161² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11451511010131) 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, 78743485 + ... + 78888778.

It is an arithmetic number, because the mean of its divisors is an integer number (2862917178768).

Almost surely, 2^{11451511010161} is an apocalyptic number.

It is an amenable number.

11451511010161 is a deficient number, since it is larger than the sum of its proper divisors (157704911).

11451511010161 is an equidigital number, since it uses as much as digits as its factorization.

11451511010161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157704910.

The product of its (nonzero) digits is 600, while the sum is 28.

Adding to 11451511010161 its reverse (16101011515411), we get a palindrome (27552522525572).

The spelling of 11451511010161 in words is "eleven trillion, four hundred fifty-one billion, five hundred eleven million, ten thousand, one hundred sixty-one".