61650537653 has 4 divisors (see below), whose sum is σ = 62695462080. Its totient is φ = 60605613228.

The previous prime is 61650537647. The next prime is 61650537659. The reversal of 61650537653 is 35673505616.

61650537653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is an interprime number because it is at equal distance from previous prime (61650537647) and next prime (61650537659).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61650537653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61650537598 and 61650537607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61650537659) 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, 522462125 + ... + 522462242.

It is an arithmetic number, because the mean of its divisors is an integer number (15673865520).

Almost surely, 2^61650537653 is an apocalyptic number.

It is an amenable number.

61650537653 is a deficient number, since it is larger than the sum of its proper divisors (1044924427).

61650537653 is a wasteful number, since it uses less digits than its factorization.

61650537653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044924426.

The product of its (nonzero) digits is 1701000, while the sum is 47.

The spelling of 61650537653 in words is "sixty-one billion, six hundred fifty million, five hundred thirty-seven thousand, six hundred fifty-three".