611951439893 has 4 divisors (see below), whose sum is σ = 612163410720. Its totient is φ = 611739469068.

The previous prime is 611951439887. The next prime is 611951439919. The reversal of 611951439893 is 398934159116.

611951439893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 611951439893 - 2¹⁰ = 611951438869 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 (611951439833) 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, 105981083 + ... + 105986856.

It is an arithmetic number, because the mean of its divisors is an integer number (153040852680).

Almost surely, 2^611951439893 is an apocalyptic number.

It is an amenable number.

611951439893 is a deficient number, since it is larger than the sum of its proper divisors (211970827).

611951439893 is a wasteful number, since it uses less digits than its factorization.

611951439893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211970826.

The product of its digits is 6298560, while the sum is 59.

The spelling of 611951439893 in words is "six hundred eleven billion, nine hundred fifty-one million, four hundred thirty-nine thousand, eight hundred ninety-three".