63633387545 has 128 divisors (see below), whose sum is σ = 98842705920. Its totient is φ = 38259164160.

The previous prime is 63633387541. The next prime is 63633387553. The reversal of 63633387545 is 54578333636.

It is not a de Polignac number, because 63633387545 - 2² = 63633387541 is a prime.

It is a super-2 number, since 2×63633387545² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63633387541) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 166144424 + ... + 166144806.

It is an arithmetic number, because the mean of its divisors is an integer number (772208640).

Almost surely, 2^63633387545 is an apocalyptic number.

63633387545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

63633387545 is a deficient number, since it is larger than the sum of its proper divisors (35209318375).

63633387545 is a wasteful number, since it uses less digits than its factorization.

63633387545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655.

The product of its digits is 16329600, while the sum is 53.

The spelling of 63633387545 in words is "sixty-three billion, six hundred thirty-three million, three hundred eighty-seven thousand, five hundred forty-five".