64511375 has 8 divisors (see below), whose sum is σ = 80510352. Its totient is φ = 51609000.

The previous prime is 64511347. The next prime is 64511407. The reversal of 64511375 is 57311546.

It is a de Polignac number, because none of the positive numbers 2^k-64511375 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257921 + ... + 258170.

It is an arithmetic number, because the mean of its divisors is an integer number (10063794).

Almost surely, 2^64511375 is an apocalyptic number.

64511375 is a deficient number, since it is larger than the sum of its proper divisors (15998977).

64511375 is an equidigital number, since it uses as much as digits as its factorization.

64511375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516106 (or 516096 counting only the distinct ones).

The product of its digits is 12600, while the sum is 32.

The square root of 64511375 is about 8031.8973474516. The cubic root of 64511375 is about 401.0625396081.

The spelling of 64511375 in words is "sixty-four million, five hundred eleven thousand, three hundred seventy-five".