439172878051 has 4 divisors (see below), whose sum is σ = 449884411704. Its totient is φ = 428461344400.

The previous prime is 439172878021. The next prime is 439172878061. The reversal of 439172878051 is 150878271934.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 439172878051 - 2²⁷ = 439038660323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 439172877983 and 439172878001.

It is not an unprimeable number, because it can be changed into a prime (439172878021) 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, 5355766765 + ... + 5355766846.

It is an arithmetic number, because the mean of its divisors is an integer number (112471102926).

Almost surely, 2^439172878051 is an apocalyptic number.

439172878051 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

439172878051 is a deficient number, since it is larger than the sum of its proper divisors (10711533653).

439172878051 is a wasteful number, since it uses less digits than its factorization.

439172878051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10711533652.

The product of its (nonzero) digits is 3386880, while the sum is 55.

The spelling of 439172878051 in words is "four hundred thirty-nine billion, one hundred seventy-two million, eight hundred seventy-eight thousand, fifty-one".