61679645481 has 16 divisors (see below), whose sum is σ = 82376947008. Its totient is φ = 41051102400.

The previous prime is 61679645431. The next prime is 61679645507. The reversal of 61679645481 is 18454697616.

61679645481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61679645481 - 2⁹ = 61679644969 is a prime.

It is a super-3 number, since 3×61679645481³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (61679645431) 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, 7411935 + ... + 7420251.

It is an arithmetic number, because the mean of its divisors is an integer number (5148559188).

Almost surely, 2^61679645481 is an apocalyptic number.

It is an amenable number.

61679645481 is a deficient number, since it is larger than the sum of its proper divisors (20697301527).

61679645481 is a wasteful number, since it uses less digits than its factorization.

61679645481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12152.

The product of its digits is 8709120, while the sum is 57.

The spelling of 61679645481 in words is "sixty-one billion, six hundred seventy-nine million, six hundred forty-five thousand, four hundred eighty-one".