11161606551 has 8 divisors (see below), whose sum is σ = 14911968000. Its totient is φ = 7426158072.

The previous prime is 11161606549. The next prime is 11161606553. The reversal of 11161606551 is 15560616111.

It is an interprime number because it is at equal distance from previous prime (11161606549) and next prime (11161606553).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11161606551 - 2¹ = 11161606549 is a prime.

It is a super-2 number, since 2×11161606551² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11161606553) 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, 3726495 + ... + 3729488.

It is an arithmetic number, because the mean of its divisors is an integer number (1863996000).

Almost surely, 2^11161606551 is an apocalyptic number.

11161606551 is a deficient number, since it is larger than the sum of its proper divisors (3750361449).

11161606551 is an equidigital number, since it uses as much as digits as its factorization.

11161606551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7456485.

The product of its (nonzero) digits is 5400, while the sum is 33.

The spelling of 11161606551 in words is "eleven billion, one hundred sixty-one million, six hundred six thousand, five hundred fifty-one".