11802757621 has 2 divisors, whose sum is σ = 11802757622. Its totient is φ = 11802757620.

The previous prime is 11802757607. The next prime is 11802757693. The reversal of 11802757621 is 12675720811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6035114596 + 5767643025 = 77686^2 + 75945^2 .

It is a cyclic number.

It is not a de Polignac number, because 11802757621 - 2¹³ = 11802749429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11802557621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5901378810 + 5901378811.

It is an arithmetic number, because the mean of its divisors is an integer number (5901378811).

Almost surely, 2^11802757621 is an apocalyptic number.

It is an amenable number.

11802757621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11802757621 is an equidigital number, since it uses as much as digits as its factorization.

11802757621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 40.

The spelling of 11802757621 in words is "eleven billion, eight hundred two million, seven hundred fifty-seven thousand, six hundred twenty-one".