243492721026 has 16 divisors (see below), whose sum is σ = 486995124000. Its totient is φ = 81162626688.

The previous prime is 243492720971. The next prime is 243492721067. The reversal of 243492721026 is 620127294342.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53071 + ... + 699858.

It is an arithmetic number, because the mean of its divisors is an integer number (30437195250).

Almost surely, 2^243492721026 is an apocalyptic number.

243492721026 is an abundant number, since it is smaller than the sum of its proper divisors (243502402974).

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

243492721026 is a wasteful number, since it uses less digits than its factorization.

243492721026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806833.

The product of its (nonzero) digits is 290304, while the sum is 42.

The spelling of 243492721026 in words is "two hundred forty-three billion, four hundred ninety-two million, seven hundred twenty-one thousand, twenty-six".