43687901426431 has 2 divisors, whose sum is σ = 43687901426432. Its totient is φ = 43687901426430.

The previous prime is 43687901426383. The next prime is 43687901426441. The reversal of 43687901426431 is 13462410978634.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43687901426431 - 2¹⁷ = 43687901295359 is a prime.

It is a super-2 number, since 2×43687901426431² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43687901426441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21843950713215 + 21843950713216.

It is an arithmetic number, because the mean of its divisors is an integer number (21843950713216).

Almost surely, 2^{43687901426431} is an apocalyptic number.

43687901426431 is a deficient number, since it is larger than the sum of its proper divisors (1).

43687901426431 is an equidigital number, since it uses as much as digits as its factorization.

43687901426431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20901888, while the sum is 58.

The spelling of 43687901426431 in words is "forty-three trillion, six hundred eighty-seven billion, nine hundred one million, four hundred twenty-six thousand, four hundred thirty-one".