7782553057 has 4 divisors (see below), whose sum is σ = 7910135956. Its totient is φ = 7654970160.

The previous prime is 7782553049. The next prime is 7782553067. The reversal of 7782553057 is 7503552877.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7503552877 = 271 ⋅27688387.

It can be written as a sum of positive squares in 2 ways, for example, as 1031630161 + 6750922896 = 32119^2 + 82164^2 .

It is a cyclic number.

It is not a de Polignac number, because 7782553057 - 2³ = 7782553049 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 7782553057.

It is not an unprimeable number, because it can be changed into a prime (7782553067) 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, 63791358 + ... + 63791479.

It is an arithmetic number, because the mean of its divisors is an integer number (1977533989).

Almost surely, 2^7782553057 is an apocalyptic number.

It is an amenable number.

7782553057 is a deficient number, since it is larger than the sum of its proper divisors (127582899).

7782553057 is a wasteful number, since it uses less digits than its factorization.

7782553057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127582898.

The product of its (nonzero) digits is 2058000, while the sum is 49.

The square root of 7782553057 is about 88218.7795030060. The cubic root of 7782553057 is about 1981.7127187317.

The spelling of 7782553057 in words is "seven billion, seven hundred eighty-two million, five hundred fifty-three thousand, fifty-seven".