61543620300 has 72 divisors (see below), whose sum is σ = 178105156096. Its totient is φ = 16408042560.

The previous prime is 61543620253. The next prime is 61543620301. The reversal of 61543620300 is 302634516.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (61543620301) 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 23 ways as a sum of consecutive naturals, for example, 1530249 + ... + 1569951.

Almost surely, 2^61543620300 is an apocalyptic number.

61543620300 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61543620300 is an abundant number, since it is smaller than the sum of its proper divisors (116561535796).

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

61543620300 is a wasteful number, since it uses less digits than its factorization.

61543620300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44887 (or 44880 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The spelling of 61543620300 in words is "sixty-one billion, five hundred forty-three million, six hundred twenty thousand, three hundred".