2678401549 has 4 divisors (see below), whose sum is σ = 2735388864. Its totient is φ = 2621414236.

The previous prime is 2678401541. The next prime is 2678401553. The reversal of 2678401549 is 9451048762.

2678401549 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, and also an emirpimes, since its reverse is a distinct semiprime: 9451048762 = 2 ⋅4725524381.

It is a cyclic number.

It is not a de Polignac number, because 2678401549 - 2³ = 2678401541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2678401499 and 2678401508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2678401541) 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, 28493587 + ... + 28493680.

It is an arithmetic number, because the mean of its divisors is an integer number (683847216).

Almost surely, 2^2678401549 is an apocalyptic number.

It is an amenable number.

2678401549 is a deficient number, since it is larger than the sum of its proper divisors (56987315).

2678401549 is an equidigital number, since it uses as much as digits as its factorization.

2678401549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56987314.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 2678401549 is about 51753.2757320732. The cubic root of 2678401549 is about 1388.7537004349.

The spelling of 2678401549 in words is "two billion, six hundred seventy-eight million, four hundred one thousand, five hundred forty-nine".