61626749904 has 60 divisors (see below), whose sum is σ = 172949868000. Its totient is φ = 20485012032.

The previous prime is 61626749897. The next prime is 61626749917. The reversal of 61626749904 is 40994762616.

It is a happy number.

61626749904 is a `hidden beast` number, since 6 + 1 + 626 + 7 + 4 + 9 + 9 + 0 + 4 = 666.

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 11 ways as a sum of consecutive naturals, for example, 544354 + ... + 647745.

It is an arithmetic number, because the mean of its divisors is an integer number (2882497800).

Almost surely, 2^61626749904 is an apocalyptic number.

It is an amenable number.

61626749904 is an abundant number, since it is smaller than the sum of its proper divisors (111323118096).

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

61626749904 is a wasteful number, since it uses less digits than its factorization.

61626749904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192472 (or 1192463 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 61626749904 in words is "sixty-one billion, six hundred twenty-six million, seven hundred forty-nine thousand, nine hundred four".