78340455770 has 8 divisors (see below), whose sum is σ = 141012820404. Its totient is φ = 31336182304.

The previous prime is 78340455769. The next prime is 78340455773. The reversal of 78340455770 is 7755404387.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 78267336169 + 73119601 = 279763^2 + 8551^2 .

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

It is a super-2 number, since 2×78340455770² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78340455773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3917022779 + ... + 3917022798.

Almost surely, 2^78340455770 is an apocalyptic number.

78340455770 is a deficient number, since it is larger than the sum of its proper divisors (62672364634).

78340455770 is a wasteful number, since it uses less digits than its factorization.

78340455770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7834045584.

The product of its (nonzero) digits is 3292800, while the sum is 50.

The spelling of 78340455770 in words is "seventy-eight billion, three hundred forty million, four hundred fifty-five thousand, seven hundred seventy".