612423778943 has 4 divisors (see below), whose sum is σ = 625454072160. Its totient is φ = 599393485728.

The previous prime is 612423778937. The next prime is 612423778961. The reversal of 612423778943 is 349877324216.

It is a happy number.

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 612423778943 - 2¹⁰ = 612423777919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612423778843) 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, 6515146538 + ... + 6515146631.

It is an arithmetic number, because the mean of its divisors is an integer number (156363518040).

Almost surely, 2^612423778943 is an apocalyptic number.

612423778943 is a deficient number, since it is larger than the sum of its proper divisors (13030293217).

612423778943 is a wasteful number, since it uses less digits than its factorization.

612423778943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13030293216.

The product of its digits is 12192768, while the sum is 56.

The spelling of 612423778943 in words is "six hundred twelve billion, four hundred twenty-three million, seven hundred seventy-eight thousand, nine hundred forty-three".