311612728802 has 4 divisors (see below), whose sum is σ = 467419093206. Its totient is φ = 155806364400.

The previous prime is 311612728771. The next prime is 311612728813. The reversal of 311612728802 is 208827216113.

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., 261682379401 + 49930349401 = 511549^2 + 223451^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 311612728802.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77903182199 + ... + 77903182202.

Almost surely, 2^311612728802 is an apocalyptic number.

311612728802 is a deficient number, since it is larger than the sum of its proper divisors (155806364404).

311612728802 is a wasteful number, since it uses less digits than its factorization.

311612728802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155806364403.

The product of its (nonzero) digits is 64512, while the sum is 41.

The spelling of 311612728802 in words is "three hundred eleven billion, six hundred twelve million, seven hundred twenty-eight thousand, eight hundred two".