61454471111 has 12 divisors (see below), whose sum is σ = 67766370672. Its totient is φ = 55688028000.

The previous prime is 61454471107. The next prime is 61454471123. The reversal of 61454471111 is 11117445416.

It is not a de Polignac number, because 61454471111 - 2² = 61454471107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61454471191) 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 11 ways as a sum of consecutive naturals, for example, 778910 + ... + 854171.

It is an arithmetic number, because the mean of its divisors is an integer number (5647197556).

Almost surely, 2^61454471111 is an apocalyptic number.

61454471111 is a deficient number, since it is larger than the sum of its proper divisors (6311899561).

61454471111 is a wasteful number, since it uses less digits than its factorization.

61454471111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1633414 (or 1633403 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The spelling of 61454471111 in words is "sixty-one billion, four hundred fifty-four million, four hundred seventy-one thousand, one hundred eleven".