61551368488 has 64 divisors (see below), whose sum is σ = 121717416960. Its totient is φ = 29123060736.

The previous prime is 61551368477. The next prime is 61551368497. The reversal of 61551368488 is 88486315516.

It is a super-2 number, since 2×61551368488² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

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 15 ways as a sum of consecutive naturals, for example, 12618306 + ... + 12623182.

It is an arithmetic number, because the mean of its divisors is an integer number (1901834640).

Almost surely, 2^61551368488 is an apocalyptic number.

It is an amenable number.

61551368488 is a deficient number, since it is larger than the sum of its proper divisors (60166048472).

61551368488 is a wasteful number, since it uses less digits than its factorization.

61551368488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5626 (or 5622 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 55.

The spelling of 61551368488 in words is "sixty-one billion, five hundred fifty-one million, three hundred sixty-eight thousand, four hundred eighty-eight".