61005015605 has 16 divisors (see below), whose sum is σ = 77197380480. Its totient is φ = 46152332352.

The previous prime is 61005015601. The next prime is 61005015613. The reversal of 61005015605 is 50651050016.

61005015605 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61005015605 - 2² = 61005015601 is a prime.

It is a super-2 number, since 2×61005015605² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61005015601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 523529 + ... + 629358.

It is an arithmetic number, because the mean of its divisors is an integer number (4824836280).

Almost surely, 2^61005015605 is an apocalyptic number.

It is an amenable number.

61005015605 is a deficient number, since it is larger than the sum of its proper divisors (16192364875).

61005015605 is a wasteful number, since it uses less digits than its factorization.

61005015605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153468.

The product of its (nonzero) digits is 4500, while the sum is 29.

The spelling of 61005015605 in words is "sixty-one billion, five million, fifteen thousand, six hundred five".