42656647743 has 12 divisors (see below), whose sum is σ = 61627000240. Its totient is φ = 28432299456.

The previous prime is 42656647687. The next prime is 42656647799. The reversal of 42656647743 is 34774665624.

42656647743 is a `hidden beast` number, since 4 + 2 + 6 + 566 + 4 + 7 + 74 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (42656647687) and next prime (42656647799).

It is not a de Polignac number, because 42656647743 - 2⁸ = 42656647487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42656647743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42656647043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 405763 + ... + 499956.

Almost surely, 2^42656647743 is an apocalyptic number.

42656647743 is a deficient number, since it is larger than the sum of its proper divisors (18970352497).

42656647743 is a wasteful number, since it uses less digits than its factorization.

42656647743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910958 (or 910955 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 54.

The spelling of 42656647743 in words is "forty-two billion, six hundred fifty-six million, six hundred forty-seven thousand, seven hundred forty-three".