53691925663 has 4 divisors (see below), whose sum is σ = 54427431568. Its totient is φ = 52956419760.

The previous prime is 53691925633. The next prime is 53691925669. The reversal of 53691925663 is 36652919635.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53691925663 - 2¹³ = 53691917471 is a prime.

It is a super-2 number, since 2×53691925663² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53691925669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367752843 + ... + 367752988.

It is an arithmetic number, because the mean of its divisors is an integer number (13606857892).

Almost surely, 2^53691925663 is an apocalyptic number.

53691925663 is a deficient number, since it is larger than the sum of its proper divisors (735505905).

53691925663 is an equidigital number, since it uses as much as digits as its factorization.

53691925663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735505904.

The product of its digits is 7873200, while the sum is 55.

The spelling of 53691925663 in words is "fifty-three billion, six hundred ninety-one million, nine hundred twenty-five thousand, six hundred sixty-three".