857779451079 has 8 divisors (see below), whose sum is σ = 1150316952432. Its totient is φ = 568547458560.

The previous prime is 857779451077. The next prime is 857779451101. The reversal of 857779451079 is 970154977758.

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

It is not a de Polignac number, because 857779451079 - 2¹ = 857779451077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857779451077) 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, 826376602 + ... + 826377639.

It is an arithmetic number, because the mean of its divisors is an integer number (143789619054).

Almost surely, 2^857779451079 is an apocalyptic number.

857779451079 is a deficient number, since it is larger than the sum of its proper divisors (292537501353).

857779451079 is a wasteful number, since it uses less digits than its factorization.

857779451079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652754417.

The product of its (nonzero) digits is 155584800, while the sum is 69.

The spelling of 857779451079 in words is "eight hundred fifty-seven billion, seven hundred seventy-nine million, four hundred fifty-one thousand, seventy-nine".