61978143300 has 72 divisors (see below), whose sum is σ = 183138861696. Its totient is φ = 16175852160.

The previous prime is 61978143299. The next prime is 61978143301. The reversal of 61978143300 is 334187916.

It is an interprime number because it is at equal distance from previous prime (61978143299) and next prime (61978143301).

It is not an unprimeable number, because it can be changed into a prime (61978143301) 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 23 ways as a sum of consecutive naturals, for example, 2183707 + ... + 2211906.

Almost surely, 2^61978143300 is an apocalyptic number.

61978143300 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61978143300 is an abundant number, since it is smaller than the sum of its proper divisors (121160718396).

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

61978143300 is a wasteful number, since it uses less digits than its factorization.

61978143300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4395677 (or 4395670 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 61978143300 in words is "sixty-one billion, nine hundred seventy-eight million, one hundred forty-three thousand, three hundred".