1040890435901 has 2 divisors, whose sum is σ = 1040890435902. Its totient is φ = 1040890435900.

The previous prime is 1040890435877. The next prime is 1040890435951. The reversal of 1040890435901 is 1095340980401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 736594779001 + 304295656900 = 858251^2 + 551630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1040890435901 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1040890435951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520445217950 + 520445217951.

It is an arithmetic number, because the mean of its divisors is an integer number (520445217951).

Almost surely, 2^{1040890435901} is an apocalyptic number.

It is an amenable number.

1040890435901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1040890435901 is an equidigital number, since it uses as much as digits as its factorization.

1040890435901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 1040890435901 in words is "one trillion, forty billion, eight hundred ninety million, four hundred thirty-five thousand, nine hundred one".