878761551 has 4 divisors (see below), whose sum is σ = 1171682072. Its totient is φ = 585841032.

The previous prime is 878761549. The next prime is 878761553. The reversal of 878761551 is 155167878.

878761551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (878761549) and next prime (878761553).

It is not a de Polignac number, because 878761551 - 2¹ = 878761549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 878761551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (878761553) 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, 146460256 + ... + 146460261.

It is an arithmetic number, because the mean of its divisors is an integer number (292920518).

Almost surely, 2^878761551 is an apocalyptic number.

878761551 is a deficient number, since it is larger than the sum of its proper divisors (292920521).

878761551 is a wasteful number, since it uses less digits than its factorization.

878761551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292920520.

The product of its digits is 470400, while the sum is 48.

The square root of 878761551 is about 29643.9125454114. The cubic root of 878761551 is about 957.8342202784.

The spelling of 878761551 in words is "eight hundred seventy-eight million, seven hundred sixty-one thousand, five hundred fifty-one".