11611722420 has 36 divisors (see below), whose sum is σ = 35222225220. Its totient is φ = 3096459264.

The previous prime is 11611722403. The next prime is 11611722433. The reversal of 11611722420 is 2422711611.

11611722420 is a `hidden beast` number, since 1 + 1 + 611 + 7 + 2 + 2 + 42 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4031234064 + 7580488356 = 63492^2 + 87066^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32254605 + ... + 32254964.

It is an arithmetic number, because the mean of its divisors is an integer number (978395145).

Almost surely, 2^11611722420 is an apocalyptic number.

11611722420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11611722420 is an abundant number, since it is smaller than the sum of its proper divisors (23610502800).

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

11611722420 is a wasteful number, since it uses less digits than its factorization.

11611722420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64509584 (or 64509579 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The spelling of 11611722420 in words is "eleven billion, six hundred eleven million, seven hundred twenty-two thousand, four hundred twenty".