78216117241570 has 64 divisors (see below), whose sum is σ = 176911276179456. Its totient is φ = 24187088479680.

The previous prime is 78216117241567. The next prime is 78216117241573. The reversal of 78216117241570 is 7514271161287.

It is an interprime number because it is at equal distance from previous prime (78216117241567) and next prime (78216117241573).

It is a super-2 number, since 2×78216117241570² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78216117241573) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 399821002 + ... + 400016581.

It is an arithmetic number, because the mean of its divisors is an integer number (2764238690304).

Almost surely, 2^{78216117241570} is an apocalyptic number.

78216117241570 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78216117241570 is an abundant number, since it is smaller than the sum of its proper divisors (98695158937886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78216117241570 is a wasteful number, since it uses less digits than its factorization.

78216117241570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799837735.

The product of its (nonzero) digits is 1317120, while the sum is 52.

The spelling of 78216117241570 in words is "seventy-eight trillion, two hundred sixteen billion, one hundred seventeen million, two hundred forty-one thousand, five hundred seventy".