61605610505 has 16 divisors (see below), whose sum is σ = 74993558400. Its totient is φ = 48573745920.

The previous prime is 61605610499. The next prime is 61605610511. The reversal of 61605610505 is 50501650616.

61605610505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61605610499) and next prime (61605610511).

It is not a de Polignac number, because 61605610505 - 2¹⁴ = 61605594121 is a prime.

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, 1068506 + ... + 1124684.

It is an arithmetic number, because the mean of its divisors is an integer number (4687097400).

Almost surely, 2^61605610505 is an apocalyptic number.

It is an amenable number.

61605610505 is a deficient number, since it is larger than the sum of its proper divisors (13387947895).

61605610505 is a wasteful number, since it uses less digits than its factorization.

61605610505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59344.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 61605610505 in words is "sixty-one billion, six hundred five million, six hundred ten thousand, five hundred five".