2628178740493 has 4 divisors (see below), whose sum is σ = 2742447381408. Its totient is φ = 2513910099580.

The previous prime is 2628178740449. The next prime is 2628178740503. The reversal of 2628178740493 is 3940478718262.

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 2628178740493 - 2⁹ = 2628178739981 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 (2628178740403) 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, 57134320423 + ... + 57134320468.

It is an arithmetic number, because the mean of its divisors is an integer number (685611845352).

Almost surely, 2^{2628178740493} is an apocalyptic number.

2628178740493 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2628178740493 is a deficient number, since it is larger than the sum of its proper divisors (114268640915).

2628178740493 is a wasteful number, since it uses less digits than its factorization.

2628178740493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114268640914.

The product of its (nonzero) digits is 32514048, while the sum is 61.

The spelling of 2628178740493 in words is "two trillion, six hundred twenty-eight billion, one hundred seventy-eight million, seven hundred forty thousand, four hundred ninety-three".