63561465 has 48 divisors (see below), whose sum is σ = 121904640. Its totient is φ = 30378240.

The previous prime is 63561461. The next prime is 63561473. The reversal of 63561465 is 56416536.

63561465 is a `hidden beast` number, since 6 + 35 + 614 + 6 + 5 = 666.

It is not a de Polignac number, because 63561465 - 2² = 63561461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63561461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35256 + ... + 37014.

It is an arithmetic number, because the mean of its divisors is an integer number (2539680).

Almost surely, 2^63561465 is an apocalyptic number.

It is an amenable number.

63561465 is a deficient number, since it is larger than the sum of its proper divisors (58343175).

63561465 is a wasteful number, since it uses less digits than its factorization.

63561465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854 (or 1851 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 63561465 is about 7972.5444495468. The cubic root of 63561465 is about 399.0842907076.

Subtracting from 63561465 its reverse (56416536), we obtain a square (7144929 = 2673²).

The spelling of 63561465 in words is "sixty-three million, five hundred sixty-one thousand, four hundred sixty-five".