6432742749 has 12 divisors (see below), whose sum is σ = 8763371264. Its totient is φ = 4197246264.

The previous prime is 6432742747. The next prime is 6432742769. The reversal of 6432742749 is 9472472346.

It is a happy number.

It is not a de Polignac number, because 6432742749 - 2¹ = 6432742747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6432742698 and 6432742707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6432742747) 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, 478717 + ... + 491970.

Almost surely, 2^6432742749 is an apocalyptic number.

It is an amenable number.

6432742749 is a deficient number, since it is larger than the sum of its proper divisors (2330628515).

6432742749 is an equidigital number, since it uses as much as digits as its factorization.

6432742749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970784 (or 970737 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 48.

The square root of 6432742749 is about 80204.3811085155. The cubic root of 6432742749 is about 1859.7963654394.

The spelling of 6432742749 in words is "six billion, four hundred thirty-two million, seven hundred forty-two thousand, seven hundred forty-nine".