77146561515256 has 8 divisors (see below), whose sum is σ = 144649802841120. Its totient is φ = 38573280757624.

The previous prime is 77146561515217. The next prime is 77146561515307. The reversal of 77146561515256 is 65251516564177.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 77146561515194 and 77146561515203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4821660094696 + ... + 4821660094711.

It is an arithmetic number, because the mean of its divisors is an integer number (18081225355140).

Almost surely, 2^{77146561515256} is an apocalyptic number.

It is an amenable number.

77146561515256 is a deficient number, since it is larger than the sum of its proper divisors (67503241325864).

77146561515256 is a wasteful number, since it uses less digits than its factorization.

77146561515256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9643320189413 (or 9643320189409 counting only the distinct ones).

The product of its digits is 52920000, while the sum is 61.

The spelling of 77146561515256 in words is "seventy-seven trillion, one hundred forty-six billion, five hundred sixty-one million, five hundred fifteen thousand, two hundred fifty-six".