61213022605500 has 96 divisors (see below), whose sum is σ = 178261886956608. Its totient is φ = 16322596768000.

The previous prime is 61213022605487. The next prime is 61213022605507. The reversal of 61213022605500 is 550622031216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61213022605507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27109990 + ... + 29281010.

It is an arithmetic number, because the mean of its divisors is an integer number (1856894655798).

Almost surely, 2^{61213022605500} is an apocalyptic number.

61213022605500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61213022605500 is an abundant number, since it is smaller than the sum of its proper divisors (117048864351108).

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

61213022605500 is a wasteful number, since it uses less digits than its factorization.

61213022605500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189840 (or 2189828 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 61213022605500 its reverse (550622031216), we get a palindrome (61763644636716).

The spelling of 61213022605500 in words is "sixty-one trillion, two hundred thirteen billion, twenty-two million, six hundred five thousand, five hundred".