40120632437 has 2 divisors, whose sum is σ = 40120632438. Its totient is φ = 40120632436.

The previous prime is 40120632413. The next prime is 40120632449. The reversal of 40120632437 is 73423602104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26883209521 + 13237422916 = 163961^2 + 115054^2 .

It is a cyclic number.

It is not a de Polignac number, because 40120632437 - 2¹⁸ = 40120370293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40120632637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20060316218 + 20060316219.

It is an arithmetic number, because the mean of its divisors is an integer number (20060316219).

Almost surely, 2^40120632437 is an apocalyptic number.

It is an amenable number.

40120632437 is a deficient number, since it is larger than the sum of its proper divisors (1).

40120632437 is an equidigital number, since it uses as much as digits as its factorization.

40120632437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 32.

The spelling of 40120632437 in words is "forty billion, one hundred twenty million, six hundred thirty-two thousand, four hundred thirty-seven".