40621791853 has 2 divisors, whose sum is σ = 40621791854. Its totient is φ = 40621791852.

The previous prime is 40621791841. The next prime is 40621791871. The reversal of 40621791853 is 35819712604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31774132009 + 8847659844 = 178253^2 + 94062^2 .

It is a cyclic number.

It is not a de Polignac number, because 40621791853 - 2³³ = 32031857261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40621791053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20310895926 + 20310895927.

It is an arithmetic number, because the mean of its divisors is an integer number (20310895927).

It is a 1-persistent number, because it is pandigital, but 2⋅40621791853 = 81243583706 is not.

Almost surely, 2^40621791853 is an apocalyptic number.

It is an amenable number.

40621791853 is a deficient number, since it is larger than the sum of its proper divisors (1).

40621791853 is an equidigital number, since it uses as much as digits as its factorization.

40621791853 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 40621791853 in words is "forty billion, six hundred twenty-one million, seven hundred ninety-one thousand, eight hundred fifty-three".