78878154873530 has 16 divisors (see below), whose sum is σ = 142042597993224. Its totient is φ = 31537502122560.

The previous prime is 78878154873517. The next prime is 78878154873619. The reversal of 78878154873530 is 3537845187887.

It can be written as a sum of positive squares in 4 ways, for example, as 49641846215809 + 29236308657721 = 7045697^2 + 5407061^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1719954281 + ... + 1720000140.

Almost surely, 2^{78878154873530} is an apocalyptic number.

78878154873530 is a deficient number, since it is larger than the sum of its proper divisors (63164443119694).

78878154873530 is a wasteful number, since it uses less digits than its factorization.

78878154873530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3439956721.

The product of its (nonzero) digits is 1264435200, while the sum is 74.

The spelling of 78878154873530 in words is "seventy-eight trillion, eight hundred seventy-eight billion, one hundred fifty-four million, eight hundred seventy-three thousand, five hundred thirty".