43781251011631 has 16 divisors (see below), whose sum is σ = 50153919568704. Its totient is φ = 37438142644224.

The previous prime is 43781251011629. The next prime is 43781251011683. The reversal of 43781251011631 is 13611015218734.

It is not a de Polignac number, because 43781251011631 - 2¹ = 43781251011629 is a prime.

It is a super-2 number, since 2×43781251011631² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43781251015631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58529775 + ... + 59273071.

It is an arithmetic number, because the mean of its divisors is an integer number (3134619973044).

Almost surely, 2^{43781251011631} is an apocalyptic number.

43781251011631 is a deficient number, since it is larger than the sum of its proper divisors (6372668557073).

43781251011631 is a wasteful number, since it uses less digits than its factorization.

43781251011631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763170.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 43781251011631 in words is "forty-three trillion, seven hundred eighty-one billion, two hundred fifty-one million, eleven thousand, six hundred thirty-one".