78553215057 has 8 divisors (see below), whose sum is σ = 104783426176. Its totient is φ = 52345906992.

The previous prime is 78553215029. The next prime is 78553215089. The reversal of 78553215057 is 75051235587.

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

It is not a de Polignac number, because 78553215057 - 2¹¹ = 78553213009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78553214997 and 78553215015.

It is not an unprimeable number, because it can be changed into a prime (78553215457) 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, 5717758 + ... + 5731479.

It is an arithmetic number, because the mean of its divisors is an integer number (13097928272).

Almost surely, 2^78553215057 is an apocalyptic number.

It is an amenable number.

78553215057 is a deficient number, since it is larger than the sum of its proper divisors (26230211119).

78553215057 is a wasteful number, since it uses less digits than its factorization.

78553215057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11451527.

The product of its (nonzero) digits is 1470000, while the sum is 48.

The spelling of 78553215057 in words is "seventy-eight billion, five hundred fifty-three million, two hundred fifteen thousand, fifty-seven".