561210023940 has 48 divisors (see below), whose sum is σ = 1571480756160. Its totient is φ = 149647178880.

The previous prime is 561210023923. The next prime is 561210023951. The reversal of 561210023940 is 49320012165.

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, 783435 + ... + 1317645.

It is an arithmetic number, because the mean of its divisors is an integer number (32739182420).

Almost surely, 2^561210023940 is an apocalyptic number.

It is an amenable number.

561210023940 is an abundant number, since it is smaller than the sum of its proper divisors (1010270732220).

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

561210023940 is a wasteful number, since it uses less digits than its factorization.

561210023940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551732 (or 551730 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 561210023940 in words is "five hundred sixty-one billion, two hundred ten million, twenty-three thousand, nine hundred forty".