7842864557 has 16 divisors (see below), whose sum is σ = 8771294400. Its totient is φ = 6950966400.

The previous prime is 7842864527. The next prime is 7842864577. The reversal of 7842864557 is 7554682487.

It is a cyclic number.

It is not a de Polignac number, because 7842864557 - 2¹⁰ = 7842863533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7842864527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240569 + ... + 271217.

It is an arithmetic number, because the mean of its divisors is an integer number (548205900).

Almost surely, 2^7842864557 is an apocalyptic number.

It is an amenable number.

7842864557 is a deficient number, since it is larger than the sum of its proper divisors (928429843).

7842864557 is a wasteful number, since it uses less digits than its factorization.

7842864557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31244.

The product of its digits is 15052800, while the sum is 56.

The square root of 7842864557 is about 88559.9489442039. The cubic root of 7842864557 is about 1986.8186972293.

The spelling of 7842864557 in words is "seven billion, eight hundred forty-two million, eight hundred sixty-four thousand, five hundred fifty-seven".