61641521752315 has 16 divisors (see below), whose sum is σ = 74075298998400. Its totient is φ = 49242904290432.

The previous prime is 61641521752303. The next prime is 61641521752339. The reversal of 61641521752315 is 51325712514616.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61641521752315 is a prime.

It is a super-2 number, since 2×61641521752315² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 387825081 + ... + 387983989.

It is an arithmetic number, because the mean of its divisors is an integer number (4629706187400).

Almost surely, 2^{61641521752315} is an apocalyptic number.

61641521752315 is a deficient number, since it is larger than the sum of its proper divisors (12433777246085).

61641521752315 is a wasteful number, since it uses less digits than its factorization.

61641521752315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269046.

The product of its digits is 1512000, while the sum is 49.

The spelling of 61641521752315 in words is "sixty-one trillion, six hundred forty-one billion, five hundred twenty-one million, seven hundred fifty-two thousand, three hundred fifteen".