64542641 has 4 divisors (see below), whose sum is σ = 65506032. Its totient is φ = 63579252.

The previous prime is 64542619. The next prime is 64542649. The reversal of 64542641 is 14624546.

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 64542641 - 2¹⁴ = 64526257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64542598 and 64542607.

It is not an unprimeable number, because it can be changed into a prime (64542649) 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, 481595 + ... + 481728.

It is an arithmetic number, because the mean of its divisors is an integer number (16376508).

Almost surely, 2^64542641 is an apocalyptic number.

It is an amenable number.

64542641 is a deficient number, since it is larger than the sum of its proper divisors (963391).

64542641 is an equidigital number, since it uses as much as digits as its factorization.

64542641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963390.

The product of its digits is 23040, while the sum is 32.

The square root of 64542641 is about 8033.8434761949. The cubic root of 64542641 is about 401.1273219616.

The spelling of 64542641 in words is "sixty-four million, five hundred forty-two thousand, six hundred forty-one".