43648562731381 has 4 divisors (see below), whose sum is σ = 44300033816992. Its totient is φ = 42997091645772.

The previous prime is 43648562731303. The next prime is 43648562731399. The reversal of 43648562731381 is 18313726584634.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 43648562731381 - 2²¹ = 43648560634229 is a prime.

It is a super-2 number, since 2×43648562731381² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43648562735381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325735542705 + ... + 325735542838.

It is an arithmetic number, because the mean of its divisors is an integer number (11075008454248).

Almost surely, 2^{43648562731381} is an apocalyptic number.

It is an amenable number.

43648562731381 is a deficient number, since it is larger than the sum of its proper divisors (651471085611).

43648562731381 is an equidigital number, since it uses as much as digits as its factorization.

43648562731381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651471085610.

The product of its digits is 69672960, while the sum is 61.

The spelling of 43648562731381 in words is "forty-three trillion, six hundred forty-eight billion, five hundred sixty-two million, seven hundred thirty-one thousand, three hundred eighty-one".