65463640 has 32 divisors (see below), whose sum is σ = 160684560. Its totient is φ = 23804800.

The previous prime is 65463631. The next prime is 65463641. The reversal of 65463640 is 4636456.

It is a junction number, because it is equal to n+sod(n) for n = 65463596 and 65463605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65463641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73951 + ... + 74830.

Almost surely, 2^65463640 is an apocalyptic number.

It is an amenable number.

65463640 is an abundant number, since it is smaller than the sum of its proper divisors (95220920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65463640 is a wasteful number, since it uses less digits than its factorization.

65463640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148803 (or 148799 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 65463640 is about 8090.9603879886. The cubic root of 65463640 is about 403.0262960878.

The spelling of 65463640 in words is "sixty-five million, four hundred sixty-three thousand, six hundred forty".