87746064778 has 16 divisors (see below), whose sum is σ = 132107309856. Its totient is φ = 43710349680.

The previous prime is 87746064743. The next prime is 87746064779.

87746064778 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (87746064779) 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, 4615300 + ... + 4634272.

It is an arithmetic number, because the mean of its divisors is an integer number (8256706866).

Almost surely, 2^87746064778 is an apocalyptic number.

87746064778 is a deficient number, since it is larger than the sum of its proper divisors (44361245078).

87746064778 is a wasteful number, since it uses less digits than its factorization.

87746064778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27429.

The product of its (nonzero) digits is 88510464, while the sum is 64.

The spelling of 87746064778 in words is "eighty-seven billion, seven hundred forty-six million, sixty-four thousand, seven hundred seventy-eight".