43780879631 has 2 divisors, whose sum is σ = 43780879632. Its totient is φ = 43780879630.

The previous prime is 43780879607. The next prime is 43780879657. The reversal of 43780879631 is 13697808734.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43780879631 - 2¹⁰ = 43780878607 is a prime.

It is a super-2 number, since 2×43780879631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43780879691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21890439815 + 21890439816.

It is an arithmetic number, because the mean of its divisors is an integer number (21890439816).

Almost surely, 2^43780879631 is an apocalyptic number.

43780879631 is a deficient number, since it is larger than the sum of its proper divisors (1).

43780879631 is an equidigital number, since it uses as much as digits as its factorization.

43780879631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6096384, while the sum is 56.

The spelling of 43780879631 in words is "forty-three billion, seven hundred eighty million, eight hundred seventy-nine thousand, six hundred thirty-one".