76780145553 has 8 divisors (see below), whose sum is σ = 105140379648. Its totient is φ = 49803337584.

The previous prime is 76780145551. The next prime is 76780145647. The reversal of 76780145553 is 35554108767.

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

It is not a de Polignac number, because 76780145553 - 2¹ = 76780145551 is a prime.

It is a super-2 number, since 2×76780145553² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 76780145496 and 76780145505.

It is not an unprimeable number, because it can be changed into a prime (76780145551) 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, 345856401 + ... + 345856622.

It is an arithmetic number, because the mean of its divisors is an integer number (13142547456).

Almost surely, 2^76780145553 is an apocalyptic number.

It is an amenable number.

76780145553 is a deficient number, since it is larger than the sum of its proper divisors (28360234095).

76780145553 is a wasteful number, since it uses less digits than its factorization.

76780145553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691713063.

The product of its (nonzero) digits is 3528000, while the sum is 51.

The spelling of 76780145553 in words is "seventy-six billion, seven hundred eighty million, one hundred forty-five thousand, five hundred fifty-three".