285815402061 has 12 divisors (see below), whose sum is σ = 443305521792. Its totient is φ = 163323086808.

The previous prime is 285815402057. The next prime is 285815402071. The reversal of 285815402061 is 160204518582.

It is not a de Polignac number, because 285815402061 - 2² = 285815402057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285815402021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 972161085 + ... + 972161378.

It is an arithmetic number, because the mean of its divisors is an integer number (36942126816).

Almost surely, 2^285815402061 is an apocalyptic number.

285815402061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

285815402061 is a deficient number, since it is larger than the sum of its proper divisors (157490119731).

285815402061 is a wasteful number, since it uses less digits than its factorization.

285815402061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944322480 (or 1944322473 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 42.

The spelling of 285815402061 in words is "two hundred eighty-five billion, eight hundred fifteen million, four hundred two thousand, sixty-one".