61361421200 has 30 divisors (see below), whose sum is σ = 147420815394. Its totient is φ = 24544568320.

The previous prime is 61361421197. The next prime is 61361421223. The reversal of 61361421200 is 212416316.

It can be written as a sum of positive squares in 3 ways, for example, as 11093987584 + 50267433616 = 105328^2 + 224204^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61361421200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76701377 + ... + 76702176.

Almost surely, 2^61361421200 is an apocalyptic number.

It is an amenable number.

61361421200 is an abundant number, since it is smaller than the sum of its proper divisors (86059394194).

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

61361421200 is a wasteful number, since it uses less digits than its factorization.

61361421200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153403571 (or 153403560 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 61361421200 its reverse (212416316), we get a palindrome (61573837516).

The spelling of 61361421200 in words is "sixty-one billion, three hundred sixty-one million, four hundred twenty-one thousand, two hundred".