78215755358027 has 16 divisors (see below), whose sum is σ = 92892246528000. Its totient is φ = 64443995975520.

The previous prime is 78215755358017. The next prime is 78215755358071. The reversal of 78215755358027 is 72085355751287.

It is not a de Polignac number, because 78215755358027 - 2²² = 78215751163723 is a prime.

It is a super-2 number, since 2×78215755358027² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78215755358017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1209502127 + ... + 1209566792.

It is an arithmetic number, because the mean of its divisors is an integer number (5805765408000).

Almost surely, 2^{78215755358027} is an apocalyptic number.

78215755358027 is a deficient number, since it is larger than the sum of its proper divisors (14676491169973).

78215755358027 is a wasteful number, since it uses less digits than its factorization.

78215755358027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2419069106.

The product of its (nonzero) digits is 164640000, while the sum is 65.

The spelling of 78215755358027 in words is "seventy-eight trillion, two hundred fifteen billion, seven hundred fifty-five million, three hundred fifty-eight thousand, twenty-seven".