61520205463 has 2 divisors, whose sum is σ = 61520205464. Its totient is φ = 61520205462.

The previous prime is 61520205419. The next prime is 61520205553. The reversal of 61520205463 is 36450202516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61520205463 - 2³³ = 52930270871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61520203463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30760102731 + 30760102732.

It is an arithmetic number, because the mean of its divisors is an integer number (30760102732).

Almost surely, 2^61520205463 is an apocalyptic number.

61520205463 is a deficient number, since it is larger than the sum of its proper divisors (1).

61520205463 is an equidigital number, since it uses as much as digits as its factorization.

61520205463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 61520205463 its reverse (36450202516), we get a palindrome (97970407979).

The spelling of 61520205463 in words is "sixty-one billion, five hundred twenty million, two hundred five thousand, four hundred sixty-three".