2742640757 has 8 divisors (see below), whose sum is σ = 2810740632. Its totient is φ = 2674598400.

The previous prime is 2742640739. The next prime is 2742640763. The reversal of 2742640757 is 7570462472.

2742640757 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 8814961 + 2733825796 = 2969^2 + 52286^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2742640757 - 2¹⁴ = 2742624373 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 (2742640717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91757 + ... + 117917.

It is an arithmetic number, because the mean of its divisors is an integer number (351342579).

Almost surely, 2^2742640757 is an apocalyptic number.

It is an amenable number.

2742640757 is a deficient number, since it is larger than the sum of its proper divisors (68099875).

2742640757 is a wasteful number, since it uses less digits than its factorization.

2742640757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28759.

The product of its (nonzero) digits is 658560, while the sum is 44.

The square root of 2742640757 is about 52370.2277730391. The cubic root of 2742640757 is about 1399.7687980449.

The spelling of 2742640757 in words is "two billion, seven hundred forty-two million, six hundred forty thousand, seven hundred fifty-seven".