61506506100011 has 16 divisors (see below), whose sum is σ = 72194938649280. Its totient is φ = 51293598675840.

The previous prime is 61506506099999. The next prime is 61506506100043. The reversal of 61506506100011 is 11000160560516.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61506506100011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61506506100511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6298025 + ... + 12754533.

It is an arithmetic number, because the mean of its divisors is an integer number (4512183665580).

Almost surely, 2^{61506506100011} is an apocalyptic number.

61506506100011 is a deficient number, since it is larger than the sum of its proper divisors (10688432549269).

61506506100011 is a wasteful number, since it uses less digits than its factorization.

61506506100011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6493334.

The product of its (nonzero) digits is 5400, while the sum is 32.

Adding to 61506506100011 its reverse (11000160560516), we get a palindrome (72506666660527).

The spelling of 61506506100011 in words is "sixty-one trillion, five hundred six billion, five hundred six million, one hundred thousand, eleven".