261037177104 has 80 divisors (see below), whose sum is σ = 737699927040. Its totient is φ = 78881777280.

The previous prime is 261037177099. The next prime is 261037177127. The reversal of 261037177104 is 401771730162.

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 15 ways as a sum of consecutive naturals, for example, 499012 + ... + 878115.

It is an arithmetic number, because the mean of its divisors is an integer number (9221249088).

Almost surely, 2^261037177104 is an apocalyptic number.

261037177104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

261037177104 is an abundant number, since it is smaller than the sum of its proper divisors (476662749936).

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

261037177104 is a wasteful number, since it uses less digits than its factorization.

261037177104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377508 (or 1377502 counting only the distinct ones).

The product of its (nonzero) digits is 49392, while the sum is 39.

The spelling of 261037177104 in words is "two hundred sixty-one billion, thirty-seven million, one hundred seventy-seven thousand, one hundred four".