11315620511 has 4 divisors (see below), whose sum is σ = 12186052872. Its totient is φ = 10445188152.

The previous prime is 11315620489. The next prime is 11315620517. The reversal of 11315620511 is 11502651311.

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 11315620511 - 2²² = 11311426207 is a prime.

It is a super-2 number, since 2×11315620511² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11315620517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435216161 + ... + 435216186.

It is an arithmetic number, because the mean of its divisors is an integer number (3046513218).

Almost surely, 2^11315620511 is an apocalyptic number.

11315620511 is a deficient number, since it is larger than the sum of its proper divisors (870432361).

11315620511 is an equidigital number, since it uses as much as digits as its factorization.

11315620511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870432360.

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 11315620511 in words is "eleven billion, three hundred fifteen million, six hundred twenty thousand, five hundred eleven".