2678507693 has 6 divisors (see below), whose sum is σ = 2729429514. Its totient is φ = 2627600144.

The previous prime is 2678507659. The next prime is 2678507701. The reversal of 2678507693 is 3967058762.

It can be written as a sum of positive squares in 3 ways, for example, as 32228329 + 2646279364 = 5677^2 + 51442^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2678507693 is a prime.

It is a super-2 number, since 2×2678507693² = 14348806922920364498, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2678507603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 373223 + ... + 380331.

It is an arithmetic number, because the mean of its divisors is an integer number (454904919).

Almost surely, 2^2678507693 is an apocalyptic number.

It is an amenable number.

2678507693 is a deficient number, since it is larger than the sum of its proper divisors (50921821).

2678507693 is an frugal number, since it uses more digits than its factorization.

2678507693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14271 (or 7162 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 53.

The square root of 2678507693 is about 51754.3012028952. The cubic root of 2678507693 is about 1388.7720454469.

Multiplying 2678507693 by its sum of digits (53), we get a square (141960907729 = 376777²).

2678507693 divided by its sum of digits (53) gives a square (50537881 = 7109²).

The spelling of 2678507693 in words is "two billion, six hundred seventy-eight million, five hundred seven thousand, six hundred ninety-three".