78401087670 has 16 divisors (see below), whose sum is σ = 188162610480. Its totient is φ = 20906956704.

The previous prime is 78401087669. The next prime is 78401087671. The reversal of 78401087670 is 7678010487.

It is an interprime number because it is at equal distance from previous prime (78401087669) and next prime (78401087671).

It is a super-2 number, since 2×78401087670² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78401087671) 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, 1306684765 + ... + 1306684824.

It is an arithmetic number, because the mean of its divisors is an integer number (11760163155).

Almost surely, 2^78401087670 is an apocalyptic number.

78401087670 is an abundant number, since it is smaller than the sum of its proper divisors (109761522810).

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

78401087670 is a wasteful number, since it uses less digits than its factorization.

78401087670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2613369599.

The product of its (nonzero) digits is 526848, while the sum is 48.

The spelling of 78401087670 in words is "seventy-eight billion, four hundred one million, eighty-seven thousand, six hundred seventy".