64611601 has 4 divisors (see below), whose sum is σ = 64631104. Its totient is φ = 64592100.

The previous prime is 64611593. The next prime is 64611649. The reversal of 64611601 is 10611646.

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, and also an emirpimes, since its reverse is a distinct semiprime: 10611646 = 2 ⋅5305823.

It is a cyclic number.

It is not a de Polignac number, because 64611601 - 2³ = 64611593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64611901) 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, 3405 + ... + 11866.

It is an arithmetic number, because the mean of its divisors is an integer number (16157776).

Almost surely, 2^64611601 is an apocalyptic number.

It is an amenable number.

64611601 is a deficient number, since it is larger than the sum of its proper divisors (19503).

64611601 is a wasteful number, since it uses less digits than its factorization.

64611601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19502.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 64611601 is about 8038.1341740481. The cubic root of 64611601 is about 401.2701313968.

The spelling of 64611601 in words is "sixty-four million, six hundred eleven thousand, six hundred one".