63749368309653 has 24 divisors (see below), whose sum is σ = 99191829121112. Its totient is φ = 39220037388288.

The previous prime is 63749368309637. The next prime is 63749368309667. The reversal of 63749368309653 is 35690386394736.

63749368309653 is a `hidden beast` number, since 6 + 3 + 7 + 493 + 6 + 83 + 0 + 9 + 6 + 53 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 860297060484 + 62889071249169 = 927522^2 + 7930263^2 .

It is not a de Polignac number, because 63749368309653 - 2⁴ = 63749368309637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63749368109653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71381476 + ... + 72269037.

Almost surely, 2^{63749368309653} is an apocalyptic number.

It is an amenable number.

63749368309653 is a deficient number, since it is larger than the sum of its proper divisors (35442460811459).

63749368309653 is a wasteful number, since it uses less digits than its factorization.

63749368309653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143654325 (or 143654322 counting only the distinct ones).

The product of its (nonzero) digits is 1587237120, while the sum is 72.

The spelling of 63749368309653 in words is "sixty-three trillion, seven hundred forty-nine billion, three hundred sixty-eight million, three hundred nine thousand, six hundred fifty-three".