87443754577631 has 2 divisors, whose sum is σ = 87443754577632. Its totient is φ = 87443754577630.

The previous prime is 87443754577601. The next prime is 87443754577691. The reversal of 87443754577631 is 13677545734478.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87443754577631 is a prime.

It is a super-2 number, since 2×87443754577631² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87443754577601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43721877288815 + 43721877288816.

It is an arithmetic number, because the mean of its divisors is an integer number (43721877288816).

Almost surely, 2^{87443754577631} is an apocalyptic number.

87443754577631 is a deficient number, since it is larger than the sum of its proper divisors (1).

87443754577631 is an equidigital number, since it uses as much as digits as its factorization.

87443754577631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1659571200, while the sum is 71.

The spelling of 87443754577631 in words is "eighty-seven trillion, four hundred forty-three billion, seven hundred fifty-four million, five hundred seventy-seven thousand, six hundred thirty-one".