561210156100 has 72 divisors (see below), whose sum is σ = 1328713144416. Its totient is φ = 204049440000.

The previous prime is 561210156079. The next prime is 561210156181. The reversal of 561210156100 is 1651012165.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9519715 + ... + 9578485.

It is an arithmetic number, because the mean of its divisors is an integer number (18454349228).

Almost surely, 2^561210156100 is an apocalyptic number.

561210156100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561210156100 is an abundant number, since it is smaller than the sum of its proper divisors (767502988316).

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

561210156100 is a wasteful number, since it uses less digits than its factorization.

561210156100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67477 (or 67470 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

Adding to 561210156100 its reverse (1651012165), we get a palindrome (562861168265).

The spelling of 561210156100 in words is "five hundred sixty-one billion, two hundred ten million, one hundred fifty-six thousand, one hundred".