61362147521 has 2 divisors, whose sum is σ = 61362147522. Its totient is φ = 61362147520.

The previous prime is 61362147467. The next prime is 61362147569. The reversal of 61362147521 is 12574126316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43249025296 + 18113122225 = 207964^2 + 134585^2 .

It is a cyclic number.

It is not a de Polignac number, because 61362147521 - 2³⁴ = 44182278337 is a prime.

It is not a weakly prime, because it can be changed into another prime (61362147421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30681073760 + 30681073761.

It is an arithmetic number, because the mean of its divisors is an integer number (30681073761).

Almost surely, 2^61362147521 is an apocalyptic number.

It is an amenable number.

61362147521 is a deficient number, since it is larger than the sum of its proper divisors (1).

61362147521 is an equidigital number, since it uses as much as digits as its factorization.

61362147521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The spelling of 61362147521 in words is "sixty-one billion, three hundred sixty-two million, one hundred forty-seven thousand, five hundred twenty-one".