11151215506 has 8 divisors (see below), whose sum is σ = 17134794684. Its totient is φ = 5439617280.

The previous prime is 11151215503. The next prime is 11151215513. The reversal of 11151215506 is 60551215111.

It can be written as a sum of positive squares in 2 ways, for example, as 11141858025 + 9357481 = 105555^2 + 3059^2 .

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

It is a super-2 number, since 2×11151215506² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11151215503) 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, 67995135 + ... + 67995298.

Almost surely, 2^11151215506 is an apocalyptic number.

11151215506 is a deficient number, since it is larger than the sum of its proper divisors (5983579178).

11151215506 is a wasteful number, since it uses less digits than its factorization.

11151215506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135990476.

The product of its (nonzero) digits is 1500, while the sum is 28.

The spelling of 11151215506 in words is "eleven billion, one hundred fifty-one million, two hundred fifteen thousand, five hundred six".