771423273420 has 96 divisors (see below), whose sum is σ = 2226799669248. Its totient is φ = 199391876352.

The previous prime is 771423273403. The next prime is 771423273433. The reversal of 771423273420 is 24372324177.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76764 + ... + 1244483.

It is an arithmetic number, because the mean of its divisors is an integer number (23195829888).

Almost surely, 2^771423273420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 771423273420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1113399834624).

771423273420 is an abundant number, since it is smaller than the sum of its proper divisors (1455376395828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

771423273420 is a wasteful number, since it uses less digits than its factorization.

771423273420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321559 (or 1321557 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 42.

Adding to 771423273420 its reverse (24372324177), we get a palindrome (795795597597).

The spelling of 771423273420 in words is "seven hundred seventy-one billion, four hundred twenty-three million, two hundred seventy-three thousand, four hundred twenty".