43687161751 has 2 divisors, whose sum is σ = 43687161752. Its totient is φ = 43687161750.

The previous prime is 43687161709. The next prime is 43687161781. The reversal of 43687161751 is 15716178634.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43687161751 - 2¹⁵ = 43687128983 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43687161695 and 43687161704.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43687161701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21843580875 + 21843580876.

It is an arithmetic number, because the mean of its divisors is an integer number (21843580876).

Almost surely, 2^43687161751 is an apocalyptic number.

43687161751 is a deficient number, since it is larger than the sum of its proper divisors (1).

43687161751 is an equidigital number, since it uses as much as digits as its factorization.

43687161751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 49.

The spelling of 43687161751 in words is "forty-three billion, six hundred eighty-seven million, one hundred sixty-one thousand, seven hundred fifty-one".