11391210691 has 8 divisors (see below), whose sum is σ = 13140195840. Its totient is φ = 9672642888.

The previous prime is 11391210671. The next prime is 11391210697. The reversal of 11391210691 is 19601219311.

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 11391210691 - 2¹³ = 11391202499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11391210697) 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, 7603531 + ... + 7605028.

It is an arithmetic number, because the mean of its divisors is an integer number (1642524480).

Almost surely, 2^11391210691 is an apocalyptic number.

11391210691 is a deficient number, since it is larger than the sum of its proper divisors (1748985149).

11391210691 is a wasteful number, since it uses less digits than its factorization.

11391210691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15208673.

The product of its (nonzero) digits is 2916, while the sum is 34.

The spelling of 11391210691 in words is "eleven billion, three hundred ninety-one million, two hundred ten thousand, six hundred ninety-one".