40621418437 has 2 divisors, whose sum is σ = 40621418438. Its totient is φ = 40621418436.

The previous prime is 40621418419. The next prime is 40621418441. The reversal of 40621418437 is 73481412604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39406617121 + 1214801316 = 198511^2 + 34854^2 .

It is a cyclic number.

It is not a de Polignac number, because 40621418437 - 2³⁵ = 6261680069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40621418437.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40621428437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20310709218 + 20310709219.

It is an arithmetic number, because the mean of its divisors is an integer number (20310709219).

Almost surely, 2^40621418437 is an apocalyptic number.

It is an amenable number.

40621418437 is a deficient number, since it is larger than the sum of its proper divisors (1).

40621418437 is an equidigital number, since it uses as much as digits as its factorization.

40621418437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 40621418437 in words is "forty billion, six hundred twenty-one million, four hundred eighteen thousand, four hundred thirty-seven".