612478320019 has 4 divisors (see below), whose sum is σ = 612513370296. Its totient is φ = 612443269744.

The previous prime is 612478319989. The next prime is 612478320061. The reversal of 612478320019 is 910023874216.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612478320019 is a prime.

It is a super-2 number, since 2×612478320019² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612478320089) 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, 17498914 + ... + 17533879.

It is an arithmetic number, because the mean of its divisors is an integer number (153128342574).

Almost surely, 2^612478320019 is an apocalyptic number.

612478320019 is a deficient number, since it is larger than the sum of its proper divisors (35050277).

612478320019 is a wasteful number, since it uses less digits than its factorization.

612478320019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35050276.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 612478320019 in words is "six hundred twelve billion, four hundred seventy-eight million, three hundred twenty thousand, nineteen".