11962540657 has 4 divisors (see below), whose sum is σ = 12592148080. Its totient is φ = 11332933236.

The previous prime is 11962540651. The next prime is 11962540669. The reversal of 11962540657 is 75604526911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11962540657 - 2⁷ = 11962540529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11962540651) 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, 314803683 + ... + 314803720.

It is an arithmetic number, because the mean of its divisors is an integer number (3148037020).

Almost surely, 2^11962540657 is an apocalyptic number.

It is an amenable number.

11962540657 is a deficient number, since it is larger than the sum of its proper divisors (629607423).

11962540657 is an equidigital number, since it uses as much as digits as its factorization.

11962540657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629607422.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 11962540657 in words is "eleven billion, nine hundred sixty-two million, five hundred forty thousand, six hundred fifty-seven".