71887505049 has 32 divisors (see below), whose sum is σ = 109101724160. Its totient is φ = 46756788624.

The previous prime is 71887504981. The next prime is 71887505057. The reversal of 71887505049 is 94050578817.

71887505049 is a `hidden beast` number, since 7 + 1 + 8 + 87 + 50 + 504 + 9 = 666.

It is not a de Polignac number, because 71887505049 - 2⁷ = 71887504921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71887504986 and 71887505004.

It is not an unprimeable number, because it can be changed into a prime (71887505059) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 990102 + ... + 1060224.

It is an arithmetic number, because the mean of its divisors is an integer number (3409428880).

Almost surely, 2^71887505049 is an apocalyptic number.

It is an amenable number.

71887505049 is a deficient number, since it is larger than the sum of its proper divisors (37214219111).

71887505049 is a wasteful number, since it uses less digits than its factorization.

71887505049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71058 (or 71052 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

The spelling of 71887505049 in words is "seventy-one billion, eight hundred eighty-seven million, five hundred five thousand, forty-nine".