61616541998 has 16 divisors (see below), whose sum is σ = 100886684976. Its totient is φ = 27990959040.

The previous prime is 61616541979. The next prime is 61616542003. The reversal of 61616541998 is 89914561616.

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 7 ways as a sum of consecutive naturals, for example, 789911 + ... + 864402.

It is an arithmetic number, because the mean of its divisors is an integer number (6305417811).

Almost surely, 2^61616541998 is an apocalyptic number.

61616541998 is a deficient number, since it is larger than the sum of its proper divisors (39270142978).

61616541998 is a wasteful number, since it uses less digits than its factorization.

61616541998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656019.

The product of its digits is 2799360, while the sum is 56.

The spelling of 61616541998 in words is "sixty-one billion, six hundred sixteen million, five hundred forty-one thousand, nine hundred ninety-eight".