1017652331978 has 4 divisors (see below), whose sum is σ = 1526478497970. Its totient is φ = 508826165988.

The previous prime is 1017652331933. The next prime is 1017652331987. The reversal of 1017652331978 is 8791332567101.

It is a happy number.

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., 943884142369 + 73768189609 = 971537^2 + 271603^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254413082993 + ... + 254413082996.

Almost surely, 2^{1017652331978} is an apocalyptic number.

1017652331978 is a deficient number, since it is larger than the sum of its proper divisors (508826165992).

1017652331978 is an equidigital number, since it uses as much as digits as its factorization.

1017652331978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508826165991.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 1017652331978 in words is "one trillion, seventeen billion, six hundred fifty-two million, three hundred thirty-one thousand, nine hundred seventy-eight".