47921957645 has 16 divisors (see below), whose sum is σ = 60903398448. Its totient is φ = 36073927680.

The previous prime is 47921957621. The next prime is 47921957651. The reversal of 47921957645 is 54675912974.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 175774564 + 47746183081 = 13258^2 + 218509^2 .

It is not a de Polignac number, because 47921957645 - 2⁶ = 47921957581 is a prime.

It is a super-3 number, since 3×47921957645³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 309635 + ... + 437855.

It is an arithmetic number, because the mean of its divisors is an integer number (3806462403).

Almost surely, 2^47921957645 is an apocalyptic number.

It is an amenable number.

47921957645 is a deficient number, since it is larger than the sum of its proper divisors (12981440803).

47921957645 is a wasteful number, since it uses less digits than its factorization.

47921957645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132640.

The product of its digits is 19051200, while the sum is 59.

The spelling of 47921957645 in words is "forty-seven billion, nine hundred twenty-one million, nine hundred fifty-seven thousand, six hundred forty-five".