2745007157 has 4 divisors (see below), whose sum is σ = 2745478080. Its totient is φ = 2744536236.

The previous prime is 2745007117. The next prime is 2745007201. The reversal of 2745007157 is 7517005472.

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 a de Polignac number, because none of the positive numbers 2^k-2745007157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2745007157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2745007117) 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, 226607 + ... + 238412.

It is an arithmetic number, because the mean of its divisors is an integer number (686369520).

Almost surely, 2^2745007157 is an apocalyptic number.

It is an amenable number.

2745007157 is a deficient number, since it is larger than the sum of its proper divisors (470923).

2745007157 is an equidigital number, since it uses as much as digits as its factorization.

2745007157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470922.

The product of its (nonzero) digits is 68600, while the sum is 38.

The square root of 2745007157 is about 52392.8158911124. The cubic root of 2745007157 is about 1400.1712642522.

The spelling of 2745007157 in words is "two billion, seven hundred forty-five million, seven thousand, one hundred fifty-seven".