61451433450 has 144 divisors (see below), whose sum is σ = 184502066112. Its totient is φ = 14533920000.

The previous prime is 61451433413. The next prime is 61451433457. The reversal of 61451433450 is 5433415416.

61451433450 is a `hidden beast` number, since 61 + 4 + 5 + 143 + 3 + 450 = 666.

It is not an unprimeable number, because it can be changed into a prime (61451433457) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 51555 + ... + 354345.

It is an arithmetic number, because the mean of its divisors is an integer number (1281264348).

Almost surely, 2^61451433450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61451433450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92251033056).

61451433450 is an abundant number, since it is smaller than the sum of its proper divisors (123050632662).

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

61451433450 is a wasteful number, since it uses less digits than its factorization.

61451433450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302861 (or 302853 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

Adding to 61451433450 its reverse (5433415416), we get a palindrome (66884848866).

The spelling of 61451433450 in words is "sixty-one billion, four hundred fifty-one million, four hundred thirty-three thousand, four hundred fifty".