3945653944261 has 8 divisors (see below), whose sum is σ = 3974101639200. Its totient is φ = 3917207130960.

The previous prime is 3945653944151. The next prime is 3945653944319. The reversal of 3945653944261 is 1624493565493.

3945653944261 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 3945653944261 - 2¹⁹ = 3945653419973 is a prime.

It is a super-2 number, since 2×3945653944261² (a number of 26 digits) contains 22 as substring.

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 3945653944261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945653944861) 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, 10708230 + ... + 11070568.

It is an arithmetic number, because the mean of its divisors is an integer number (496762704900).

Almost surely, 2^{3945653944261} is an apocalyptic number.

It is an amenable number.

3945653944261 is a deficient number, since it is larger than the sum of its proper divisors (28447694939).

3945653944261 is a wasteful number, since it uses less digits than its factorization.

3945653944261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440819.

The product of its digits is 83980800, while the sum is 61.

The spelling of 3945653944261 in words is "three trillion, nine hundred forty-five billion, six hundred fifty-three million, nine hundred forty-four thousand, two hundred sixty-one".