61489117126081 has 4 divisors (see below), whose sum is σ = 64162557001152. Its totient is φ = 58815677251012.

The previous prime is 61489117125941. The next prime is 61489117126103. The reversal of 61489117126081 is 18062171198416.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61489117126081 - 2²³ = 61489108737473 is a prime.

It is a super-2 number, since 2×61489117126081² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61489117126181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1336719937501 + ... + 1336719937546.

It is an arithmetic number, because the mean of its divisors is an integer number (16040639250288).

Almost surely, 2^{61489117126081} is an apocalyptic number.

It is an amenable number.

61489117126081 is a deficient number, since it is larger than the sum of its proper divisors (2673439875071).

61489117126081 is a wasteful number, since it uses less digits than its factorization.

61489117126081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673439875070.

The product of its (nonzero) digits is 1161216, while the sum is 55.

The spelling of 61489117126081 in words is "sixty-one trillion, four hundred eighty-nine billion, one hundred seventeen million, one hundred twenty-six thousand, eighty-one".