865519048428 has 24 divisors (see below), whose sum is σ = 2032918917120. Its totient is φ = 286595710800.

The previous prime is 865519048423. The next prime is 865519048453. The reversal of 865519048428 is 824840915568.

865519048428 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (865519048421) 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, 238827948 + ... + 238831571.

It is an arithmetic number, because the mean of its divisors is an integer number (84704954880).

Almost surely, 2^865519048428 is an apocalyptic number.

It is an amenable number.

865519048428 is an abundant number, since it is smaller than the sum of its proper divisors (1167399868692).

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

865519048428 is a wasteful number, since it uses less digits than its factorization.

865519048428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477659677 (or 477659675 counting only the distinct ones).

The product of its (nonzero) digits is 22118400, while the sum is 60.

The spelling of 865519048428 in words is "eight hundred sixty-five billion, five hundred nineteen million, forty-eight thousand, four hundred twenty-eight".