77861463 has 8 divisors (see below), whose sum is σ = 108329088. Its totient is φ = 49650744.

The previous prime is 77861453. The next prime is 77861467. The reversal of 77861463 is 36416877.

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

It is a de Polignac number, because none of the positive numbers 2^k-77861463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77861467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 564145 + ... + 564282.

It is an arithmetic number, because the mean of its divisors is an integer number (13541136).

Almost surely, 2^77861463 is an apocalyptic number.

77861463 is a deficient number, since it is larger than the sum of its proper divisors (30467625).

77861463 is a wasteful number, since it uses less digits than its factorization.

77861463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128453.

The product of its digits is 169344, while the sum is 42.

The square root of 77861463 is about 8823.9142674892. The cubic root of 77861463 is about 427.0127604338.

The spelling of 77861463 in words is "seventy-seven million, eight hundred sixty-one thousand, four hundred sixty-three".