612643522 has 8 divisors (see below), whose sum is σ = 931908672. Its totient is φ = 302007300.

The previous prime is 612643519. The next prime is 612643523. The reversal of 612643522 is 225346216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (612643523) 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, 2157054 + ... + 2157337.

It is an arithmetic number, because the mean of its divisors is an integer number (116488584).

Almost surely, 2^612643522 is an apocalyptic number.

612643522 is a deficient number, since it is larger than the sum of its proper divisors (319265150).

612643522 is a wasteful number, since it uses less digits than its factorization.

612643522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4314464.

The product of its digits is 17280, while the sum is 31.

The square root of 612643522 is about 24751.6367539603. The cubic root of 612643522 is about 849.3159534602.

Adding to 612643522 its reverse (225346216), we get a palindrome (837989738).

The spelling of 612643522 in words is "six hundred twelve million, six hundred forty-three thousand, five hundred twenty-two".