63001640 has 32 divisors (see below), whose sum is σ = 152659080. Its totient is φ = 23261952.

The previous prime is 63001633. The next prime is 63001649. The reversal of 63001640 is 4610036.

It can be written as a sum of positive squares in 4 ways, for example, as 26977636 + 36024004 = 5194^2 + 6002^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (63001649) 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, 60059 + ... + 61098.

Almost surely, 2^63001640 is an apocalyptic number.

It is an amenable number.

63001640 is an abundant number, since it is smaller than the sum of its proper divisors (89657440).

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

63001640 is a wasteful number, since it uses less digits than its factorization.

63001640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121181 (or 121177 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 63001640 is about 7937.3572428107. The cubic root of 63001640 is about 397.9091734866.

Adding to 63001640 its reverse (4610036), we get a palindrome (67611676).

The spelling of 63001640 in words is "sixty-three million, one thousand, six hundred forty".