46811781 has 6 divisors (see below), whose sum is σ = 67617030. Its totient is φ = 31207848.

The previous prime is 46811759. The next prime is 46811789. The reversal of 46811781 is 18711864.

46811781 is a `hidden beast` number, since 468 + 117 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 43678881 + 3132900 = 6609^2 + 1770^2 .

It is not a de Polignac number, because 46811781 - 2⁶ = 46811717 is a prime.

It is a super-2 number, since 2×46811781² = 4382685680783922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46811789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2600646 + ... + 2600663.

It is an arithmetic number, because the mean of its divisors is an integer number (11269505).

Almost surely, 2^46811781 is an apocalyptic number.

It is an amenable number.

46811781 is a deficient number, since it is larger than the sum of its proper divisors (20805249).

46811781 is a wasteful number, since it uses less digits than its factorization.

46811781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201315 (or 5201312 counting only the distinct ones).

The product of its digits is 10752, while the sum is 36.

The square root of 46811781 is about 6841.9135481238. The cubic root of 46811781 is about 360.4002261842.

The spelling of 46811781 in words is "forty-six million, eight hundred eleven thousand, seven hundred eighty-one".