2159450777 has 4 divisors (see below), whose sum is σ = 2355764496. Its totient is φ = 1963137060.

The previous prime is 2159450759. The next prime is 2159450779. The reversal of 2159450777 is 7770549512.

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 2159450777 - 2²⁶ = 2092341913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2159450779) 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, 98156843 + ... + 98156864.

It is an arithmetic number, because the mean of its divisors is an integer number (588941124).

Almost surely, 2^2159450777 is an apocalyptic number.

It is an amenable number.

2159450777 is a deficient number, since it is larger than the sum of its proper divisors (196313719).

2159450777 is a wasteful number, since it uses less digits than its factorization.

2159450777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196313718.

The product of its (nonzero) digits is 617400, while the sum is 47.

The square root of 2159450777 is about 46469.8910801392. The cubic root of 2159450777 is about 1292.5512431499.

The spelling of 2159450777 in words is "two billion, one hundred fifty-nine million, four hundred fifty thousand, seven hundred seventy-seven".