61651001605653 has 10 divisors (see below), whose sum is σ = 92095940670294. Its totient is φ = 41100667737048.

The previous prime is 61651001605651. The next prime is 61651001605679. The reversal of 61651001605653 is 35650610015616.

61651001605653 is a `hidden beast` number, since 6 + 1 + 65 + 10 + 0 + 16 + 0 + 565 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 44715126441969 + 16935875163684 = 6686937^2 + 4115322^2 .

It is not a de Polignac number, because 61651001605653 - 2¹ = 61651001605651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61651001605599 and 61651001605608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61651001605651) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 380561738226 + ... + 380561738387.

Almost surely, 2^{61651001605653} is an apocalyptic number.

It is an amenable number.

61651001605653 is a deficient number, since it is larger than the sum of its proper divisors (30444939064641).

61651001605653 is an equidigital number, since it uses as much as digits as its factorization.

61651001605653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761123476625 (or 761123476616 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 61651001605653 in words is "sixty-one trillion, six hundred fifty-one billion, one million, six hundred five thousand, six hundred fifty-three".