78153956709 has 8 divisors (see below), whose sum is σ = 104374168320. Its totient is φ = 52018191456.

The previous prime is 78153956681. The next prime is 78153956723. The reversal of 78153956709 is 90765935187.

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

It is not a de Polignac number, because 78153956709 - 2⁵ = 78153956677 is a prime.

It is a super-2 number, since 2×78153956709² (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 (78153556709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21109429 + ... + 21113130.

It is an arithmetic number, because the mean of its divisors is an integer number (13046771040).

Almost surely, 2^78153956709 is an apocalyptic number.

It is an amenable number.

78153956709 is a deficient number, since it is larger than the sum of its proper divisors (26220211611).

78153956709 is a wasteful number, since it uses less digits than its factorization.

78153956709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42223179.

The product of its (nonzero) digits is 14288400, while the sum is 60.

The spelling of 78153956709 in words is "seventy-eight billion, one hundred fifty-three million, nine hundred fifty-six thousand, seven hundred nine".