61878539359 has 8 divisors (see below), whose sum is σ = 76158202400. Its totient is φ = 48958844256.

The previous prime is 61878539353. The next prime is 61878539441. The reversal of 61878539359 is 95393587816.

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

It is not a de Polignac number, because 61878539359 - 2³¹ = 59731055711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61878539359.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61878539353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339991884 + ... + 339992065.

It is an arithmetic number, because the mean of its divisors is an integer number (9519775300).

Almost surely, 2^61878539359 is an apocalyptic number.

61878539359 is a deficient number, since it is larger than the sum of its proper divisors (14279663041).

61878539359 is a wasteful number, since it uses less digits than its factorization.

61878539359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679983969.

The product of its digits is 48988800, while the sum is 64.

The spelling of 61878539359 in words is "sixty-one billion, eight hundred seventy-eight million, five hundred thirty-nine thousand, three hundred fifty-nine".