315642051778 has 8 divisors (see below), whose sum is σ = 489789390780. Its totient is φ = 152378921520.

The previous prime is 315642051757. The next prime is 315642051841. The reversal of 315642051778 is 877150246513.

It can be written as a sum of positive squares in 2 ways, for example, as 307056732129 + 8585319649 = 554127^2 + 92657^2 .

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

It is a super-2 number, since 2×315642051778² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2721052113 + ... + 2721052228.

Almost surely, 2^315642051778 is an apocalyptic number.

315642051778 is a deficient number, since it is larger than the sum of its proper divisors (174147339002).

315642051778 is a wasteful number, since it uses less digits than its factorization.

315642051778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5442104372.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 315642051778 in words is "three hundred fifteen billion, six hundred forty-two million, fifty-one thousand, seven hundred seventy-eight".