61506614990 has 8 divisors (see below), whose sum is σ = 110711907000. Its totient is φ = 24602645992.

The previous prime is 61506614969. The next prime is 61506614999. The reversal of 61506614990 is 9941660516.

It is a happy number.

61506614990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61506614999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3075330740 + ... + 3075330759.

It is an arithmetic number, because the mean of its divisors is an integer number (13838988375).

Almost surely, 2^61506614990 is an apocalyptic number.

61506614990 is a deficient number, since it is larger than the sum of its proper divisors (49205292010).

61506614990 is a wasteful number, since it uses less digits than its factorization.

61506614990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6150661506.

The product of its (nonzero) digits is 349920, while the sum is 47.

The spelling of 61506614990 in words is "sixty-one billion, five hundred six million, six hundred fourteen thousand, nine hundred ninety".