61865754290681 has 8 divisors (see below), whose sum is σ = 67517204506464. Its totient is φ = 56218852530720.

The previous prime is 61865754290647. The next prime is 61865754290687. The reversal of 61865754290681 is 18609245756816.

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

It is not a de Polignac number, because 61865754290681 - 2³⁸ = 61590876383737 is a prime.

It is a super-3 number, since 3×61865754290681³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61865754290687) 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, 1137085511 + ... + 1137139916.

It is an arithmetic number, because the mean of its divisors is an integer number (8439650563308).

Almost surely, 2^{61865754290681} is an apocalyptic number.

It is an amenable number.

61865754290681 is a deficient number, since it is larger than the sum of its proper divisors (5651450215783).

61865754290681 is a wasteful number, since it uses less digits than its factorization.

61865754290681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274227911.

The product of its (nonzero) digits is 174182400, while the sum is 68.

The spelling of 61865754290681 in words is "sixty-one trillion, eight hundred sixty-five billion, seven hundred fifty-four million, two hundred ninety thousand, six hundred eighty-one".