53773916691 has 16 divisors (see below), whose sum is σ = 78223483008. Its totient is φ = 32587387200.

The previous prime is 53773916569. The next prime is 53773916699. The reversal of 53773916691 is 19661937735.

It is not a de Polignac number, because 53773916691 - 2⁷ = 53773916563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53773916699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345676 + ... + 476486.

It is an arithmetic number, because the mean of its divisors is an integer number (4888967688).

Almost surely, 2^53773916691 is an apocalyptic number.

53773916691 is a deficient number, since it is larger than the sum of its proper divisors (24449566317).

53773916691 is a wasteful number, since it uses less digits than its factorization.

53773916691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143282.

The product of its digits is 6429780, while the sum is 57.

The spelling of 53773916691 in words is "fifty-three billion, seven hundred seventy-three million, nine hundred sixteen thousand, six hundred ninety-one".