61011100001 has 4 divisors (see below), whose sum is σ = 61385401392. Its totient is φ = 60636798612.

The previous prime is 61011099979. The next prime is 61011100009. The reversal of 61011100001 is 10000111016.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61011100001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61011100009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187150451 + ... + 187150776.

It is an arithmetic number, because the mean of its divisors is an integer number (15346350348).

Almost surely, 2^61011100001 is an apocalyptic number.

It is an amenable number.

61011100001 is a deficient number, since it is larger than the sum of its proper divisors (374301391).

61011100001 is a wasteful number, since it uses less digits than its factorization.

61011100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374301390.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 61011100001 its reverse (10000111016), we get a palindrome (71011211017).

The spelling of 61011100001 in words is "sixty-one billion, eleven million, one hundred thousand, one".