61006561026 has 8 divisors (see below), whose sum is σ = 122013122064. Its totient is φ = 20335520340.

The previous prime is 61006560959. The next prime is 61006561079. The reversal of 61006561026 is 62016560016.

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

61006561026 is an admirable number.

It is a super-3 number, since 3×61006561026³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5083880080 + ... + 5083880091.

It is an arithmetic number, because the mean of its divisors is an integer number (15251640258).

Almost surely, 2^61006561026 is an apocalyptic number.

61006561026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61006561026 is a wasteful number, since it uses less digits than its factorization.

61006561026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10167760176.

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 61006561026 in words is "sixty-one billion, six million, five hundred sixty-one thousand, twenty-six".