61501565479 has 2 divisors, whose sum is σ = 61501565480. Its totient is φ = 61501565478.

The previous prime is 61501565413. The next prime is 61501565483. The reversal of 61501565479 is 97456510516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61501565479 - 2¹⁵ = 61501532711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61501560479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30750782739 + 30750782740.

It is an arithmetic number, because the mean of its divisors is an integer number (30750782740).

Almost surely, 2^61501565479 is an apocalyptic number.

61501565479 is a deficient number, since it is larger than the sum of its proper divisors (1).

61501565479 is an equidigital number, since it uses as much as digits as its factorization.

61501565479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134000, while the sum is 49.

The spelling of 61501565479 in words is "sixty-one billion, five hundred one million, five hundred sixty-five thousand, four hundred seventy-nine".