612366491 has 4 divisors (see below), whose sum is σ = 668036184. Its totient is φ = 556696800.

The previous prime is 612366481. The next prime is 612366499. The reversal of 612366491 is 194663216.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-612366491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612366499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27834830 + ... + 27834851.

It is an arithmetic number, because the mean of its divisors is an integer number (167009046).

Almost surely, 2^612366491 is an apocalyptic number.

612366491 is a deficient number, since it is larger than the sum of its proper divisors (55669693).

612366491 is a wasteful number, since it uses less digits than its factorization.

612366491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55669692.

The product of its digits is 46656, while the sum is 38.

The square root of 612366491 is about 24746.0399054071. The cubic root of 612366491 is about 849.1879168924.

The spelling of 612366491 in words is "six hundred twelve million, three hundred sixty-six thousand, four hundred ninety-one".