61551512022 has 128 divisors (see below), whose sum is σ = 166653139968. Its totient is φ = 14757431040.

The previous prime is 61551512021. The next prime is 61551512069. The reversal of 61551512022 is 22021515516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61551512021) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 684378 + ... + 769074.

It is an arithmetic number, because the mean of its divisors is an integer number (1301977656).

Almost surely, 2^61551512022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61551512022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83326569984).

61551512022 is an abundant number, since it is smaller than the sum of its proper divisors (105101627946).

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

61551512022 is a wasteful number, since it uses less digits than its factorization.

61551512022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84755 (or 84733 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The spelling of 61551512022 in words is "sixty-one billion, five hundred fifty-one million, five hundred twelve thousand, twenty-two".