77899477870 has 8 divisors (see below), whose sum is σ = 140219060184. Its totient is φ = 31159791144.

The previous prime is 77899477819. The next prime is 77899477891. The reversal of 77899477870 is 7877499877.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 77899477793 and 77899477802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3894973884 + ... + 3894973903.

It is an arithmetic number, because the mean of its divisors is an integer number (17527382523).

Almost surely, 2^77899477870 is an apocalyptic number.

77899477870 is a deficient number, since it is larger than the sum of its proper divisors (62319582314).

77899477870 is a wasteful number, since it uses less digits than its factorization.

77899477870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7789947794.

The product of its (nonzero) digits is 348509952, while the sum is 73.

The spelling of 77899477870 in words is "seventy-seven billion, eight hundred ninety-nine million, four hundred seventy-seven thousand, eight hundred seventy".