61445010004 has 18 divisors (see below), whose sum is σ = 125084485050. Its totient is φ = 26333575632.

The previous prime is 61445009981. The next prime is 61445010037. The reversal of 61445010004 is 40001054416.

It can be written as a sum of positive squares in only one way, i.e., 61370152900 + 74857104 = 247730^2 + 8652^2 .

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 156747279 + ... + 156747670.

Almost surely, 2^61445010004 is an apocalyptic number.

It is an amenable number.

61445010004 is an abundant number, since it is smaller than the sum of its proper divisors (63639475046).

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

61445010004 is a wasteful number, since it uses less digits than its factorization.

61445010004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313494967 (or 313494958 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The spelling of 61445010004 in words is "sixty-one billion, four hundred forty-five million, ten thousand, four".