61015606561 has 8 divisors (see below), whose sum is σ = 75096131264. Its totient is φ = 48276084240.

The previous prime is 61015606549. The next prime is 61015606573. The reversal of 61015606561 is 16560651016.

It is an interprime number because it is at equal distance from previous prime (61015606549) and next prime (61015606573).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61015606561 - 2¹⁵ = 61015573793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61015606561.

It is not an unprimeable number, because it can be changed into a prime (61015606541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335250495 + ... + 335250676.

It is an arithmetic number, because the mean of its divisors is an integer number (9387016408).

Almost surely, 2^61015606561 is an apocalyptic number.

It is an amenable number.

61015606561 is a deficient number, since it is larger than the sum of its proper divisors (14080524703).

61015606561 is a wasteful number, since it uses less digits than its factorization.

61015606561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670501191.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 61015606561 in words is "sixty-one billion, fifteen million, six hundred six thousand, five hundred sixty-one".