61611651598 has 8 divisors (see below), whose sum is σ = 105619974192. Its totient is φ = 26404993536.

The previous prime is 61611651551. The next prime is 61611651641. The reversal of 61611651598 is 89515611616.

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

It is a super-2 number, since 2×61611651598² (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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2200416115 + ... + 2200416142.

It is an arithmetic number, because the mean of its divisors is an integer number (13202496774).

Almost surely, 2^61611651598 is an apocalyptic number.

61611651598 is a deficient number, since it is larger than the sum of its proper divisors (44008322594).

61611651598 is a wasteful number, since it uses less digits than its factorization.

61611651598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4400832266.

The product of its digits is 388800, while the sum is 49.

The spelling of 61611651598 in words is "sixty-one billion, six hundred eleven million, six hundred fifty-one thousand, five hundred ninety-eight".