11961049637 has 2 divisors, whose sum is σ = 11961049638. Its totient is φ = 11961049636.

The previous prime is 11961049621. The next prime is 11961049729. The reversal of 11961049637 is 73694016911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7131633601 + 4829416036 = 84449^2 + 69494^2 .

It is a cyclic number.

It is not a de Polignac number, because 11961049637 - 2⁴ = 11961049621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11961049591 and 11961049600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11961099637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5980524818 + 5980524819.

It is an arithmetic number, because the mean of its divisors is an integer number (5980524819).

Almost surely, 2^11961049637 is an apocalyptic number.

It is an amenable number.

11961049637 is a deficient number, since it is larger than the sum of its proper divisors (1).

11961049637 is an equidigital number, since it uses as much as digits as its factorization.

11961049637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 11961049637 in words is "eleven billion, nine hundred sixty-one million, forty-nine thousand, six hundred thirty-seven".