61613357537 has 2 divisors, whose sum is σ = 61613357538. Its totient is φ = 61613357536.

The previous prime is 61613357521. The next prime is 61613357629. The reversal of 61613357537 is 73575331616.

61613357537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61068788641 + 544568896 = 247121^2 + 23336^2 .

It is a cyclic number.

It is not a de Polignac number, because 61613357537 - 2⁴ = 61613357521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61613357491 and 61613357500.

It is not a weakly prime, because it can be changed into another prime (61613353537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30806678768 + 30806678769.

It is an arithmetic number, because the mean of its divisors is an integer number (30806678769).

Almost surely, 2^61613357537 is an apocalyptic number.

It is an amenable number.

61613357537 is a deficient number, since it is larger than the sum of its proper divisors (1).

61613357537 is an equidigital number, since it uses as much as digits as its factorization.

61613357537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1190700, while the sum is 47.

The spelling of 61613357537 in words is "sixty-one billion, six hundred thirteen million, three hundred fifty-seven thousand, five hundred thirty-seven".