77242460031566 has 4 divisors (see below), whose sum is σ = 115863690047352. Its totient is φ = 38621230015782.

The previous prime is 77242460031547. The next prime is 77242460031571. The reversal of 77242460031566 is 66513006424277.

It is a semiprime because it is the product of two primes.

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, 19310615007890 + ... + 19310615007893.

It is an arithmetic number, because the mean of its divisors is an integer number (28965922511838).

Almost surely, 2^{77242460031566} is an apocalyptic number.

77242460031566 is a deficient number, since it is larger than the sum of its proper divisors (38621230015786).

77242460031566 is a wasteful number, since it uses less digits than its factorization.

77242460031566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38621230015785.

The product of its (nonzero) digits is 10160640, while the sum is 53.

The spelling of 77242460031566 in words is "seventy-seven trillion, two hundred forty-two billion, four hundred sixty million, thirty-one thousand, five hundred sixty-six".