40196898721 has 8 divisors (see below), whose sum is σ = 45940777344. Its totient is φ = 34453386240.

The previous prime is 40196898691. The next prime is 40196898739. The reversal of 40196898721 is 12789869104.

It is a happy number.

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

It is not a de Polignac number, because 40196898721 - 2⁵ = 40196898689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40196895721) 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, 209916 + ... + 352786.

It is an arithmetic number, because the mean of its divisors is an integer number (5742597168).

Almost surely, 2^40196898721 is an apocalyptic number.

It is an amenable number.

40196898721 is a deficient number, since it is larger than the sum of its proper divisors (5743878623).

40196898721 is a wasteful number, since it uses less digits than its factorization.

40196898721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183071.

The product of its (nonzero) digits is 1741824, while the sum is 55.

The spelling of 40196898721 in words is "forty billion, one hundred ninety-six million, eight hundred ninety-eight thousand, seven hundred twenty-one".