40641951061 has 4 divisors (see below), whose sum is σ = 41506673472. Its totient is φ = 39777228652.

The previous prime is 40641951013. The next prime is 40641951067. The reversal of 40641951061 is 16015914604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40641951061 - 2⁷ = 40641950933 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40641951061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40641951067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432361135 + ... + 432361228.

It is an arithmetic number, because the mean of its divisors is an integer number (10376668368).

Almost surely, 2^40641951061 is an apocalyptic number.

It is an amenable number.

40641951061 is a deficient number, since it is larger than the sum of its proper divisors (864722411).

40641951061 is an equidigital number, since it uses as much as digits as its factorization.

40641951061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864722410.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 40641951061 in words is "forty billion, six hundred forty-one million, nine hundred fifty-one thousand, sixty-one".