61632368922557 has 2 divisors, whose sum is σ = 61632368922558. Its totient is φ = 61632368922556.

The previous prime is 61632368922541. The next prime is 61632368922569. The reversal of 61632368922557 is 75522986323616.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61008377937796 + 623990984761 = 7810786^2 + 789931^2 .

It is a cyclic number.

It is not a de Polignac number, because 61632368922557 - 2⁴ = 61632368922541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61632368922493 and 61632368922502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61632358922557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30816184461278 + 30816184461279.

It is an arithmetic number, because the mean of its divisors is an integer number (30816184461279).

Almost surely, 2^{61632368922557} is an apocalyptic number.

It is an amenable number.

61632368922557 is a deficient number, since it is larger than the sum of its proper divisors (1).

61632368922557 is an equidigital number, since it uses as much as digits as its factorization.

61632368922557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 195955200, while the sum is 65.

The spelling of 61632368922557 in words is "sixty-one trillion, six hundred thirty-two billion, three hundred sixty-eight million, nine hundred twenty-two thousand, five hundred fifty-seven".