78341687802 has 96 divisors (see below), whose sum is σ = 196694918784. Its totient is φ = 22072780800.

The previous prime is 78341687783. The next prime is 78341687807. The reversal of 78341687802 is 20878614387.

It is a happy number.

78341687802 is a `hidden beast` number, since 78 + 3 + 416 + 87 + 80 + 2 = 666.

It is a super-2 number, since 2×78341687802² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78341687807) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3422977 + ... + 3445787.

It is an arithmetic number, because the mean of its divisors is an integer number (2048905404).

Almost surely, 2^78341687802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78341687802, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98347459392).

78341687802 is an abundant number, since it is smaller than the sum of its proper divisors (118353230982).

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

78341687802 is a wasteful number, since it uses less digits than its factorization.

78341687802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23204 (or 23201 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The spelling of 78341687802 in words is "seventy-eight billion, three hundred forty-one million, six hundred eighty-seven thousand, eight hundred two".