61862712681 has 32 divisors (see below), whose sum is σ = 106382822400. Its totient is φ = 31028316480.

The previous prime is 61862712679. The next prime is 61862712701. The reversal of 61862712681 is 18621726816.

It is not a de Polignac number, because 61862712681 - 2¹ = 61862712679 is a prime.

It is a super-2 number, since 2×61862712681² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61862712681.

It is not an unprimeable number, because it can be changed into a prime (61862712631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4610611 + ... + 4624008.

It is an arithmetic number, because the mean of its divisors is an integer number (3324463200).

Almost surely, 2^61862712681 is an apocalyptic number.

It is an amenable number.

61862712681 is a deficient number, since it is larger than the sum of its proper divisors (44520109719).

61862712681 is a wasteful number, since it uses less digits than its factorization.

61862712681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9234669.

The product of its digits is 387072, while the sum is 48.

The spelling of 61862712681 in words is "sixty-one billion, eight hundred sixty-two million, seven hundred twelve thousand, six hundred eighty-one".