61136106505521 has 8 divisors (see below), whose sum is σ = 81526624154400. Its totient is φ = 40751496596832.

The previous prime is 61136106505511. The next prime is 61136106505559. The reversal of 61136106505521 is 12550560163116.

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

It is not a de Polignac number, because 61136106505521 - 2¹³ = 61136106497329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61136106505511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1476910900 + ... + 1476952293.

It is an arithmetic number, because the mean of its divisors is an integer number (10190828019300).

Almost surely, 2^{61136106505521} is an apocalyptic number.

It is an amenable number.

61136106505521 is a deficient number, since it is larger than the sum of its proper divisors (20390517648879).

61136106505521 is a wasteful number, since it uses less digits than its factorization.

61136106505521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2953870095.

The product of its (nonzero) digits is 162000, while the sum is 42.

Adding to 61136106505521 its reverse (12550560163116), we get a palindrome (73686666668637).

The spelling of 61136106505521 in words is "sixty-one trillion, one hundred thirty-six billion, one hundred six million, five hundred five thousand, five hundred twenty-one".