61611202011 has 16 divisors (see below), whose sum is σ = 82764839808. Its totient is φ = 40765972800.

The previous prime is 61611201983. The next prime is 61611202019. The reversal of 61611202011 is 11020211616.

61611202011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61611202011 - 2⁶ = 61611201947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61611202019) 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, 2491096 + ... + 2515706.

It is an arithmetic number, because the mean of its divisors is an integer number (5172802488).

Almost surely, 2^61611202011 is an apocalyptic number.

61611202011 is a deficient number, since it is larger than the sum of its proper divisors (21153637797).

61611202011 is a wasteful number, since it uses less digits than its factorization.

61611202011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30842.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 61611202011 its reverse (11020211616), we get a palindrome (72631413627).

The spelling of 61611202011 in words is "sixty-one billion, six hundred eleven million, two hundred two thousand, eleven".