64461551 has 16 divisors (see below), whose sum is σ = 81392640. Its totient is φ = 49589280.

The previous prime is 64461541. The next prime is 64461557. The reversal of 64461551 is 15516446.

It is a cyclic number.

It is not a de Polignac number, because 64461551 - 2²² = 60267247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64461557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 785 + ... + 11381.

It is an arithmetic number, because the mean of its divisors is an integer number (5087040).

Almost surely, 2^64461551 is an apocalyptic number.

64461551 is a deficient number, since it is larger than the sum of its proper divisors (16931089).

64461551 is a wasteful number, since it uses less digits than its factorization.

64461551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10694.

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

The square root of 64461551 is about 8028.7951150842. The cubic root of 64461551 is about 400.9592622841.

Adding to 64461551 its reverse (15516446), we get a palindrome (79977997).

It can be divided in two parts, 6446 and 1551, that added together give a palindrome (7997).

The spelling of 64461551 in words is "sixty-four million, four hundred sixty-one thousand, five hundred fifty-one".