77551173400061 has 8 divisors (see below), whose sum is σ = 77587587386880. Its totient is φ = 77514760173312.

The previous prime is 77551173400031. The next prime is 77551173400121. The reversal of 77551173400061 is 16000437115577.

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 77551173400061 - 2¹⁸ = 77551173137917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77551173399979 and 77551173400015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77551173400031) 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, 389403236 + ... + 389602338.

It is an arithmetic number, because the mean of its divisors is an integer number (9698448423360).

Almost surely, 2^{77551173400061} is an apocalyptic number.

It is an amenable number.

77551173400061 is a deficient number, since it is larger than the sum of its proper divisors (36413986819).

77551173400061 is a wasteful number, since it uses less digits than its factorization.

77551173400061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380035.

The product of its (nonzero) digits is 617400, while the sum is 47.

The spelling of 77551173400061 in words is "seventy-seven trillion, five hundred fifty-one billion, one hundred seventy-three million, four hundred thousand, sixty-one".