261676535057064 has 64 divisors (see below), whose sum is σ = 728557969305600. Its totient is φ = 87024067054848.

The previous prime is 261676535057053. The next prime is 261676535057123. The reversal of 261676535057064 is 460750535676162.

261676535057064 is a `hidden beast` number, since 2 + 6 + 1 + 6 + 7 + 6 + 5 + 3 + 50 + 570 + 6 + 4 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 261676535056992 and 261676535057010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1398827304 + ... + 1399014359.

It is an arithmetic number, because the mean of its divisors is an integer number (11383718270400).

Almost surely, 2^{261676535057064} is an apocalyptic number.

261676535057064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

261676535057064 is an abundant number, since it is smaller than the sum of its proper divisors (466881434248536).

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

261676535057064 is a wasteful number, since it uses less digits than its factorization.

261676535057064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797842111 (or 2797842101 counting only the distinct ones).

The product of its (nonzero) digits is 190512000, while the sum is 63.

The spelling of 261676535057064 in words is "two hundred sixty-one trillion, six hundred seventy-six billion, five hundred thirty-five million, fifty-seven thousand, sixty-four".