612153643 has 4 divisors (see below), whose sum is σ = 613411120. Its totient is φ = 610896168.

The previous prime is 612153623. The next prime is 612153649. The reversal of 612153643 is 346351216.

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

It is a cyclic number.

It is not a de Polignac number, because 612153643 - 2⁵ = 612153611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612153649) 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, 628008 + ... + 628981.

It is an arithmetic number, because the mean of its divisors is an integer number (153352780).

Almost surely, 2^612153643 is an apocalyptic number.

612153643 is a deficient number, since it is larger than the sum of its proper divisors (1257477).

612153643 is a wasteful number, since it uses less digits than its factorization.

612153643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257476.

The product of its digits is 12960, while the sum is 31.

The square root of 612153643 is about 24741.7388839184. The cubic root of 612153643 is about 849.0895178138.

The spelling of 612153643 in words is "six hundred twelve million, one hundred fifty-three thousand, six hundred forty-three".