11961258145 has 8 divisors (see below), whose sum is σ = 14466530304. Its totient is φ = 9493659504.

The previous prime is 11961258121. The next prime is 11961258173. The reversal of 11961258145 is 54185216911.

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

It is a cyclic number.

It is not a de Polignac number, because 11961258145 - 2¹³ = 11961249953 is a prime.

It is a super-2 number, since 2×11961258145² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9417679 + ... + 9418948.

It is an arithmetic number, because the mean of its divisors is an integer number (1808316288).

Almost surely, 2^11961258145 is an apocalyptic number.

It is an amenable number.

11961258145 is a deficient number, since it is larger than the sum of its proper divisors (2505272159).

11961258145 is a wasteful number, since it uses less digits than its factorization.

11961258145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18836759.

The product of its digits is 86400, while the sum is 43.

The spelling of 11961258145 in words is "eleven billion, nine hundred sixty-one million, two hundred fifty-eight thousand, one hundred forty-five".