53091787797 has 32 divisors (see below), whose sum is σ = 84646546560. Its totient is φ = 32766370560.

The previous prime is 53091787783. The next prime is 53091787807. The reversal of 53091787797 is 79778719035.

53091787797 is a `hidden beast` number, since 5 + 309 + 178 + 77 + 97 = 666.

It is not a de Polignac number, because 53091787797 - 2³¹ = 50944304149 is a prime.

It is a super-2 number, since 2×53091787797² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53091787747) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 920103 + ... + 976100.

It is an arithmetic number, because the mean of its divisors is an integer number (2645204580).

Almost surely, 2^53091787797 is an apocalyptic number.

It is an amenable number.

53091787797 is a deficient number, since it is larger than the sum of its proper divisors (31554758763).

53091787797 is a wasteful number, since it uses less digits than its factorization.

53091787797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896290 (or 1896284 counting only the distinct ones).

The product of its (nonzero) digits is 23337720, while the sum is 63.

The spelling of 53091787797 in words is "fifty-three billion, ninety-one million, seven hundred eighty-seven thousand, seven hundred ninety-seven".