261283082420 has 48 divisors (see below), whose sum is σ = 587041593600. Its totient is φ = 97389371520.

The previous prime is 261283082383. The next prime is 261283082453. The reversal of 261283082420 is 24280382162.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5612780 + ... + 5659139.

It is an arithmetic number, because the mean of its divisors is an integer number (12230033200).

Almost surely, 2^261283082420 is an apocalyptic number.

261283082420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261283082420 is an abundant number, since it is smaller than the sum of its proper divisors (325758511180).

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

261283082420 is a wasteful number, since it uses less digits than its factorization.

261283082420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11272008 (or 11272006 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The spelling of 261283082420 in words is "two hundred sixty-one billion, two hundred eighty-three million, eighty-two thousand, four hundred twenty".