61402040444 has 12 divisors (see below), whose sum is σ = 113774369184. Its totient is φ = 28895077824.

The previous prime is 61402040429. The next prime is 61402040467. The reversal of 61402040444 is 44404020416.

It is a super-2 number, since 2×61402040444² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 451485524 + ... + 451485659.

It is an arithmetic number, because the mean of its divisors is an integer number (9481197432).

Almost surely, 2^61402040444 is an apocalyptic number.

It is an amenable number.

61402040444 is a deficient number, since it is larger than the sum of its proper divisors (52372328740).

61402040444 is a wasteful number, since it uses less digits than its factorization.

61402040444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902971204 (or 902971202 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 29.

The spelling of 61402040444 in words is "sixty-one billion, four hundred two million, forty thousand, four hundred forty-four".