61244354652 has 96 divisors (see below), whose sum is σ = 155235763200. Its totient is φ = 18680792832.

The previous prime is 61244354641. The next prime is 61244354657. The reversal of 61244354652 is 25645344216.

It is a happy number.

It is a super-2 number, since 2×61244354652² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61244354657) 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, 17974333 + ... + 17977739.

It is an arithmetic number, because the mean of its divisors is an integer number (1617039200).

Almost surely, 2^61244354652 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61244354652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77617881600).

61244354652 is an abundant number, since it is smaller than the sum of its proper divisors (93991408548).

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

61244354652 is a wasteful number, since it uses less digits than its factorization.

61244354652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4395 (or 4393 counting only the distinct ones).

The product of its digits is 691200, while the sum is 42.

Adding to 61244354652 its reverse (25645344216), we get a palindrome (86889698868).

The spelling of 61244354652 in words is "sixty-one billion, two hundred forty-four million, three hundred fifty-four thousand, six hundred fifty-two".