40921644251 has 8 divisors (see below), whose sum is σ = 41393181024. Its totient is φ = 40451535360.

The previous prime is 40921644241. The next prime is 40921644259. The reversal of 40921644251 is 15244612904.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40921644251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40921644259) 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, 299270 + ... + 414011.

It is an arithmetic number, because the mean of its divisors is an integer number (5174147628).

Almost surely, 2^40921644251 is an apocalyptic number.

40921644251 is a deficient number, since it is larger than the sum of its proper divisors (471536773).

40921644251 is a wasteful number, since it uses less digits than its factorization.

40921644251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713941.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 40921644251 in words is "forty billion, nine hundred twenty-one million, six hundred forty-four thousand, two hundred fifty-one".