61012039990 has 16 divisors (see below), whose sum is σ = 119805460560. Its totient is φ = 22186196320.

The previous prime is 61012039987. The next prime is 61012039999. The reversal of 61012039990 is 9993021016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61012039999) 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 7 ways as a sum of consecutive naturals, for example, 277327345 + ... + 277327564.

It is an arithmetic number, because the mean of its divisors is an integer number (7487841285).

Almost surely, 2^61012039990 is an apocalyptic number.

61012039990 is a deficient number, since it is larger than the sum of its proper divisors (58793420570).

61012039990 is a wasteful number, since it uses less digits than its factorization.

61012039990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554654927.

The product of its (nonzero) digits is 26244, while the sum is 40.

The spelling of 61012039990 in words is "sixty-one billion, twelve million, thirty-nine thousand, nine hundred ninety".