3945644757495 has 192 divisors, whose sum is σ = 8429499187200. Its totient is φ = 1667576021760.

The previous prime is 3945644757407. The next prime is 3945644757499. The reversal of 3945644757495 is 5947574465493.

3945644757495 is a `hidden beast` number, since 3 + 9 + 4 + 5 + 6 + 4 + 47 + 574 + 9 + 5 = 666.

It is not a de Polignac number, because 3945644757495 - 2⁹ = 3945644756983 is a prime.

It is a super-2 number, since 2×3945644757495² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3945644757499) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 188424736 + ... + 188445674.

It is an arithmetic number, because the mean of its divisors is an integer number (43903641600).

Almost surely, 2^{3945644757495} is an apocalyptic number.

3945644757495 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

3945644757495 is an abundant number, since it is smaller than the sum of its proper divisors (4483854429705).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3945644757495 is a wasteful number, since it uses less digits than its factorization.

3945644757495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21850 (or 21847 counting only the distinct ones).

The product of its digits is 2286144000, while the sum is 72.

The spelling of 3945644757495 in words is "three trillion, nine hundred forty-five billion, six hundred forty-four million, seven hundred fifty-seven thousand, four hundred ninety-five".