11457649442 has 6 divisors (see below), whose sum is σ = 17186701233. Its totient is φ = 5728749032.

The previous prime is 11457649417. The next prime is 11457649447. The reversal of 11457649442 is 24494675411.

It can be written as a sum of positive squares in 2 ways, for example, as 6393761521 + 5063887921 = 79961^2 + 71161^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=75689.

It is a super-2 number, since 2×11457649442² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11457649447) 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 2 ways as a sum of consecutive naturals, for example, 113534 + ... + 189222.

Almost surely, 2^11457649442 is an apocalyptic number.

11457649442 is a deficient number, since it is larger than the sum of its proper divisors (5729051791).

11457649442 is an frugal number, since it uses more digits than its factorization.

11457649442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151380 (or 75691 counting only the distinct ones).

The product of its digits is 967680, while the sum is 47.

The spelling of 11457649442 in words is "eleven billion, four hundred fifty-seven million, six hundred forty-nine thousand, four hundred forty-two".