78155160510551 has 8 divisors (see below), whose sum is σ = 78607614829680. Its totient is φ = 77702714127232.

The previous prime is 78155160510533. The next prime is 78155160510593. The reversal of 78155160510551 is 15501506155187.

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

It is a cyclic number.

It is not a de Polignac number, because 78155160510551 - 2⁶ = 78155160510487 is a prime.

It is a super-2 number, since 2×78155160510551² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78155160510551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78155160510851) 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, 18372716 + ... + 22223118.

It is an arithmetic number, because the mean of its divisors is an integer number (9825951853710).

Almost surely, 2^{78155160510551} is an apocalyptic number.

78155160510551 is a deficient number, since it is larger than the sum of its proper divisors (452454319129).

78155160510551 is a wasteful number, since it uses less digits than its factorization.

78155160510551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3967905.

The product of its (nonzero) digits is 1050000, while the sum is 50.

The spelling of 78155160510551 in words is "seventy-eight trillion, one hundred fifty-five billion, one hundred sixty million, five hundred ten thousand, five hundred fifty-one".