40613797681 has 8 divisors (see below), whose sum is σ = 42775325280. Its totient is φ = 38454666048.

The previous prime is 40613797667. The next prime is 40613797687. The reversal of 40613797681 is 18679731604.

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

It is not a de Polignac number, because 40613797681 - 2¹⁵ = 40613764913 is a prime.

It is a super-2 number, since 2×40613797681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40613797687) 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 7 ways as a sum of consecutive naturals, for example, 564136 + ... + 632041.

It is an arithmetic number, because the mean of its divisors is an integer number (5346915660).

Almost surely, 2^40613797681 is an apocalyptic number.

It is an amenable number.

40613797681 is a deficient number, since it is larger than the sum of its proper divisors (2161527599).

40613797681 is a wasteful number, since it uses less digits than its factorization.

40613797681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197983.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 40613797681 in words is "forty billion, six hundred thirteen million, seven hundred ninety-seven thousand, six hundred eighty-one".