1161515155015 has 4 divisors (see below), whose sum is σ = 1393818186024. Its totient is φ = 929212124008.

The previous prime is 1161515154979. The next prime is 1161515155033. The reversal of 1161515155015 is 5105515151611.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1161515155015 - 2¹³ = 1161515146823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116151515497 + ... + 116151515506.

It is an arithmetic number, because the mean of its divisors is an integer number (348454546506).

Almost surely, 2^{1161515155015} is an apocalyptic number.

1161515155015 is a deficient number, since it is larger than the sum of its proper divisors (232303031009).

1161515155015 is an equidigital number, since it uses as much as digits as its factorization.

1161515155015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232303031008.

The product of its (nonzero) digits is 18750, while the sum is 37.

The spelling of 1161515155015 in words is "one trillion, one hundred sixty-one billion, five hundred fifteen million, one hundred fifty-five thousand, fifteen".