46778994149 has 2 divisors, whose sum is σ = 46778994150. Its totient is φ = 46778994148.

The previous prime is 46778994139. The next prime is 46778994161. The reversal of 46778994149 is 94149987764.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39241629025 + 7537365124 = 198095^2 + 86818^2 .

It is a cyclic number.

It is not a de Polignac number, because 46778994149 - 2⁴ = 46778994133 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (46778994139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23389497074 + 23389497075.

It is an arithmetic number, because the mean of its divisors is an integer number (23389497075).

Almost surely, 2^46778994149 is an apocalyptic number.

It is an amenable number.

46778994149 is a deficient number, since it is larger than the sum of its proper divisors (1).

46778994149 is an equidigital number, since it uses as much as digits as its factorization.

46778994149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109734912, while the sum is 68.

The spelling of 46778994149 in words is "forty-six billion, seven hundred seventy-eight million, nine hundred ninety-four thousand, one hundred forty-nine".