87377643729 has 16 divisors (see below), whose sum is σ = 131570467840. Its totient is φ = 57296814480.

The previous prime is 87377643721. The next prime is 87377643799. The reversal of 87377643729 is 92734677378.

87377643729 is a `hidden beast` number, since 87 + 37 + 76 + 437 + 29 = 666.

It is not a de Polignac number, because 87377643729 - 2³ = 87377643721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87377643721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26524657 + ... + 26527950.

It is an arithmetic number, because the mean of its divisors is an integer number (8223154240).

Almost surely, 2^87377643729 is an apocalyptic number.

It is an amenable number.

87377643729 is a deficient number, since it is larger than the sum of its proper divisors (44192824111).

87377643729 is a wasteful number, since it uses less digits than its factorization.

87377643729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53052677 (or 53052671 counting only the distinct ones).

The product of its digits is 74680704, while the sum is 63.

The spelling of 87377643729 in words is "eighty-seven billion, three hundred seventy-seven million, six hundred forty-three thousand, seven hundred twenty-nine".