854977728129 has 32 divisors (see below), whose sum is σ = 1398356616960. Its totient is φ = 453521037312.

The previous prime is 854977728053. The next prime is 854977728173. The reversal of 854977728129 is 921827779458.

It is a happy number.

It is not a de Polignac number, because 854977728129 - 2¹⁷ = 854977597057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (854977727129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16377334 + ... + 16429455.

It is an arithmetic number, because the mean of its divisors is an integer number (43698644280).

Almost surely, 2^854977728129 is an apocalyptic number.

It is an amenable number.

854977728129 is a deficient number, since it is larger than the sum of its proper divisors (543378888831).

854977728129 is a wasteful number, since it uses less digits than its factorization.

854977728129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32806889.

The product of its digits is 142248960, while the sum is 69.

The spelling of 854977728129 in words is "eight hundred fifty-four billion, nine hundred seventy-seven million, seven hundred twenty-eight thousand, one hundred twenty-nine".