64506437 has 4 divisors (see below), whose sum is σ = 64537440. Its totient is φ = 64475436.

The previous prime is 64506427. The next prime is 64506439. The reversal of 64506437 is 73460546.

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 64506437 - 2⁶ = 64506373 is a prime.

It is a super-2 number, since 2×64506437² = 8322160828869938, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64506397 and 64506406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64506439) 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, 12137 + ... + 16622.

It is an arithmetic number, because the mean of its divisors is an integer number (16134360).

Almost surely, 2^64506437 is an apocalyptic number.

It is an amenable number.

64506437 is a deficient number, since it is larger than the sum of its proper divisors (31003).

64506437 is a wasteful number, since it uses less digits than its factorization.

64506437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31002.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 64506437 is about 8031.5899422219. The cubic root of 64506437 is about 401.0523062844.

The spelling of 64506437 in words is "sixty-four million, five hundred six thousand, four hundred thirty-seven".