43151897977 has 2 divisors, whose sum is σ = 43151897978. Its totient is φ = 43151897976.

The previous prime is 43151897911. The next prime is 43151897989. The reversal of 43151897977 is 77979815134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42592291641 + 559606336 = 206379^2 + 23656^2 .

It is a cyclic number.

It is not a de Polignac number, because 43151897977 - 2¹⁵ = 43151865209 is a prime.

It is not a weakly prime, because it can be changed into another prime (43151897077) 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, 21575948988 + 21575948989.

It is an arithmetic number, because the mean of its divisors is an integer number (21575948989).

Almost surely, 2^43151897977 is an apocalyptic number.

It is an amenable number.

43151897977 is a deficient number, since it is larger than the sum of its proper divisors (1).

43151897977 is an equidigital number, since it uses as much as digits as its factorization.

43151897977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13335840, while the sum is 61.

The spelling of 43151897977 in words is "forty-three billion, one hundred fifty-one million, eight hundred ninety-seven thousand, nine hundred seventy-seven".