61994843970 has 32 divisors (see below), whose sum is σ = 148807732608. Its totient is φ = 16529724288.

The previous prime is 61994843957. The next prime is 61994843971. The reversal of 61994843970 is 7934849916.

It is not an unprimeable number, because it can be changed into a prime (61994843971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92382 + ... + 364038.

It is an arithmetic number, because the mean of its divisors is an integer number (4650241644).

Almost surely, 2^61994843970 is an apocalyptic number.

61994843970 is an abundant number, since it is smaller than the sum of its proper divisors (86812888638).

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

61994843970 is a wasteful number, since it uses less digits than its factorization.

61994843970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279274.

The product of its (nonzero) digits is 11757312, while the sum is 60.

The spelling of 61994843970 in words is "sixty-one billion, nine hundred ninety-four million, eight hundred forty-three thousand, nine hundred seventy".