61650414251 has 2 divisors, whose sum is σ = 61650414252. Its totient is φ = 61650414250.

The previous prime is 61650414229. The next prime is 61650414299. The reversal of 61650414251 is 15241405616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61650414251 - 2¹⁴ = 61650397867 is a prime.

It is not a weakly prime, because it can be changed into another prime (61650414751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30825207125 + 30825207126.

It is an arithmetic number, because the mean of its divisors is an integer number (30825207126).

Almost surely, 2^61650414251 is an apocalyptic number.

61650414251 is a deficient number, since it is larger than the sum of its proper divisors (1).

61650414251 is an equidigital number, since it uses as much as digits as its factorization.

61650414251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 61650414251 its reverse (15241405616), we get a palindrome (76891819867).

The spelling of 61650414251 in words is "sixty-one billion, six hundred fifty million, four hundred fourteen thousand, two hundred fifty-one".