64551461 has 12 divisors (see below), whose sum is σ = 70293132. Its totient is φ = 58927104.

The previous prime is 64551457. The next prime is 64551467. The reversal of 64551461 is 16415546.

It can be written as a sum of positive squares in 2 ways, for example, as 40883236 + 23668225 = 6394^2 + 4865^2 .

It is not a de Polignac number, because 64551461 - 2² = 64551457 is a prime.

It is a super-2 number, since 2×64551461² = 8333782234469042, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64551467) 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, 251045 + ... + 251301.

It is an arithmetic number, because the mean of its divisors is an integer number (5857761).

Almost surely, 2^64551461 is an apocalyptic number.

It is an amenable number.

64551461 is a deficient number, since it is larger than the sum of its proper divisors (5741671).

64551461 is a wasteful number, since it uses less digits than its factorization.

64551461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548 (or 409 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 64551461 is about 8034.3923852398. The cubic root of 64551461 is about 401.1455929929.

The spelling of 64551461 in words is "sixty-four million, five hundred fifty-one thousand, four hundred sixty-one".