87737073778 has 4 divisors (see below), whose sum is σ = 131605610670. Its totient is φ = 43868536888.

The previous prime is 87737073761. The next prime is 87737073793.

It is a happy number.

87737073778 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in only one way, i.e., 52834240449 + 34902833329 = 229857^2 + 186823^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21934268443 + ... + 21934268446.

Almost surely, 2^87737073778 is an apocalyptic number.

87737073778 is a deficient number, since it is larger than the sum of its proper divisors (43868536892).

87737073778 is a wasteful number, since it uses less digits than its factorization.

87737073778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43868536891.

The product of its (nonzero) digits is 67765824, while the sum is 64.

The spelling of 87737073778 in words is "eighty-seven billion, seven hundred thirty-seven million, seventy-three thousand, seven hundred seventy-eight".