47787010821 has 72 divisors (see below), whose sum is σ = 78179538528. Its totient is φ = 27892080000.

The previous prime is 47787010807. The next prime is 47787010837. The reversal of 47787010821 is 12801078774.

47787010821 is a `hidden beast` number, since 477 + 8 + 70 + 108 + 2 + 1 = 666.

It is not a de Polignac number, because 47787010821 - 2⁹ = 47787010309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47787010801) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 13686886 + ... + 13690376.

It is an arithmetic number, because the mean of its divisors is an integer number (1085826924).

Almost surely, 2^47787010821 is an apocalyptic number.

It is an amenable number.

47787010821 is a deficient number, since it is larger than the sum of its proper divisors (30392527707).

47787010821 is a wasteful number, since it uses less digits than its factorization.

47787010821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3683 (or 3643 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 45.

The spelling of 47787010821 in words is "forty-seven billion, seven hundred eighty-seven million, ten thousand, eight hundred twenty-one".