64503161 has 4 divisors (see below), whose sum is σ = 64635024. Its totient is φ = 64371300.

The previous prime is 64503137. The next prime is 64503181. The reversal of 64503161 is 16130546.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64503161 - 2⁶ = 64503097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64503161.

It is not an unprimeable number, because it can be changed into a prime (64503181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65195 + ... + 66176.

It is an arithmetic number, because the mean of its divisors is an integer number (16158756).

Almost surely, 2^64503161 is an apocalyptic number.

It is an amenable number.

64503161 is a deficient number, since it is larger than the sum of its proper divisors (131863).

64503161 is a wasteful number, since it uses less digits than its factorization.

64503161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131862.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 64503161 is about 8031.3859949575. The cubic root of 64503161 is about 401.0455169382.

The spelling of 64503161 in words is "sixty-four million, five hundred three thousand, one hundred sixty-one".