11401772897 has 4 divisors (see below), whose sum is σ = 11402710020. Its totient is φ = 11400835776.

The previous prime is 11401772843. The next prime is 11401772929. The reversal of 11401772897 is 79827710411.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3170928721 + 8230844176 = 56311^2 + 90724^2 .

It is a cyclic number.

It is not a de Polignac number, because 11401772897 - 2¹² = 11401768801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11401772807) 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, 450068 + ... + 474725.

It is an arithmetic number, because the mean of its divisors is an integer number (2850677505).

Almost surely, 2^11401772897 is an apocalyptic number.

It is an amenable number.

11401772897 is a deficient number, since it is larger than the sum of its proper divisors (937123).

11401772897 is an equidigital number, since it uses as much as digits as its factorization.

11401772897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937122.

The product of its (nonzero) digits is 197568, while the sum is 47.

The spelling of 11401772897 in words is "eleven billion, four hundred one million, seven hundred seventy-two thousand, eight hundred ninety-seven".