61651654911 has 72 divisors (see below), whose sum is σ = 113584380624. Its totient is φ = 31863767040.

The previous prime is 61651654907. The next prime is 61651654913. The reversal of 61651654911 is 11945615616.

61651654911 is a `hidden beast` number, since 616 + 5 + 16 + 5 + 4 + 9 + 11 = 666.

It is not a de Polignac number, because 61651654911 - 2² = 61651654907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61651654913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 923391 + ... + 987903.

It is an arithmetic number, because the mean of its divisors is an integer number (1577560842).

Almost surely, 2^61651654911 is an apocalyptic number.

61651654911 is a deficient number, since it is larger than the sum of its proper divisors (51932725713).

61651654911 is a wasteful number, since it uses less digits than its factorization.

61651654911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64741 (or 64731 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The spelling of 61651654911 in words is "sixty-one billion, six hundred fifty-one million, six hundred fifty-four thousand, nine hundred eleven".