53648532749 has 4 divisors (see below), whose sum is σ = 61312608864. Its totient is φ = 45984456636.

The previous prime is 53648532737. The next prime is 53648532787. The reversal of 53648532749 is 94723584635.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94723584635 = 5 ⋅18944716927.

It is a cyclic number.

It is not a de Polignac number, because 53648532749 - 2²⁸ = 53380097293 is a prime.

It is a super-2 number, since 2×53648532749² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53648532694 and 53648532703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53648532709) 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, 3832038047 + ... + 3832038060.

It is an arithmetic number, because the mean of its divisors is an integer number (15328152216).

Almost surely, 2^53648532749 is an apocalyptic number.

It is an amenable number.

53648532749 is a deficient number, since it is larger than the sum of its proper divisors (7664076115).

53648532749 is an equidigital number, since it uses as much as digits as its factorization.

53648532749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7664076114.

The product of its digits is 21772800, while the sum is 56.

The spelling of 53648532749 in words is "fifty-three billion, six hundred forty-eight million, five hundred thirty-two thousand, seven hundred forty-nine".