61551302000 has 40 divisors (see below), whose sum is σ = 148831053072. Its totient is φ = 24620520000.

The previous prime is 61551301963. The next prime is 61551302003. The reversal of 61551302000 is 20315516.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61551302003) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 15385826 + ... + 15389825.

Almost surely, 2^61551302000 is an apocalyptic number.

It is an amenable number.

61551302000 is an abundant number, since it is smaller than the sum of its proper divisors (87279751072).

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

61551302000 is a wasteful number, since it uses less digits than its factorization.

61551302000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30775674 (or 30775658 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

Adding to 61551302000 its reverse (20315516), we get a palindrome (61571617516).

The spelling of 61551302000 in words is "sixty-one billion, five hundred fifty-one million, three hundred two thousand".