61605051501100 has 72 divisors (see below), whose sum is σ = 135191341731600. Its totient is φ = 24364004121600.

The previous prime is 61605051501089. The next prime is 61605051501109. The reversal of 61605051501100 is 110515050616.

It is not an unprimeable number, because it can be changed into a prime (61605051501109) 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 23 ways as a sum of consecutive naturals, for example, 204647496 + ... + 204948304.

It is an arithmetic number, because the mean of its divisors is an integer number (1877657524050).

Almost surely, 2^{61605051501100} is an apocalyptic number.

It is an amenable number.

61605051501100 is an abundant number, since it is smaller than the sum of its proper divisors (73586290230500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61605051501100 is a wasteful number, since it uses less digits than its factorization.

61605051501100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323923 (or 323916 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 31.

Adding to 61605051501100 its reverse (110515050616), we get a palindrome (61715566551716).

The spelling of 61605051501100 in words is "sixty-one trillion, six hundred five billion, fifty-one million, five hundred one thousand, one hundred".