878590661398 has 8 divisors (see below), whose sum is σ = 1322575978680. Its totient is φ = 437732001840.

The previous prime is 878590661393. The next prime is 878590661401. The reversal of 878590661398 is 893166095878.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878590661393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781663728 + ... + 781664851.

It is an arithmetic number, because the mean of its divisors is an integer number (165321997335).

Almost surely, 2^878590661398 is an apocalyptic number.

878590661398 is a deficient number, since it is larger than the sum of its proper divisors (443985317282).

878590661398 is a wasteful number, since it uses less digits than its factorization.

878590661398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1563328862.

The product of its (nonzero) digits is 156764160, while the sum is 70.

The spelling of 878590661398 in words is "eight hundred seventy-eight billion, five hundred ninety million, six hundred sixty-one thousand, three hundred ninety-eight".