16245242644 has 12 divisors (see below), whose sum is σ = 29197530964. Its totient is φ = 7903090944.

The previous prime is 16245242621. The next prime is 16245242647. The reversal of 16245242644 is 44624254261.

It can be written as a sum of positive squares in 2 ways, for example, as 7811024400 + 8434218244 = 88380^2 + 91838^2 .

It is a super-2 number, since 2×16245242644² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16245242597 and 16245242606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16245242647) 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, 54882429 + ... + 54882724.

Almost surely, 2^16245242644 is an apocalyptic number.

It is an amenable number.

16245242644 is a deficient number, since it is larger than the sum of its proper divisors (12952288320).

16245242644 is a wasteful number, since it uses less digits than its factorization.

16245242644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109765194 (or 109765192 counting only the distinct ones).

The product of its digits is 368640, while the sum is 40.

The spelling of 16245242644 in words is "sixteen billion, two hundred forty-five million, two hundred forty-two thousand, six hundred forty-four".