911787946461 has 24 divisors (see below), whose sum is σ = 1543790178240. Its totient is φ = 521014182336.

The previous prime is 911787946457. The next prime is 911787946471. The reversal of 911787946461 is 164649787119.

911787946461 is a `hidden beast` number, since 9 + 1 + 1 + 7 + 87 + 94 + 6 + 461 = 666.

It is not a de Polignac number, because 911787946461 - 2² = 911787946457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (911787946471) 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 23 ways as a sum of consecutive naturals, for example, 13092645 + ... + 13162101.

It is an arithmetic number, because the mean of its divisors is an integer number (64324590760).

Almost surely, 2^911787946461 is an apocalyptic number.

It is an amenable number.

911787946461 is a deficient number, since it is larger than the sum of its proper divisors (632002231779).

911787946461 is an frugal number, since it uses more digits than its factorization.

911787946461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138930 (or 69467 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 63.

The spelling of 911787946461 in words is "nine hundred eleven billion, seven hundred eighty-seven million, nine hundred forty-six thousand, four hundred sixty-one".