1339661097978 has 32 divisors (see below), whose sum is σ = 3063175989120. Its totient is φ = 382623628800.

The previous prime is 1339661097953. The next prime is 1339661097991. The reversal of 1339661097978 is 8797901669331.

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 15 ways as a sum of consecutive naturals, for example, 5576163 + ... + 5811446.

It is an arithmetic number, because the mean of its divisors is an integer number (95724249660).

Almost surely, 2^{1339661097978} is an apocalyptic number.

1339661097978 is an abundant number, since it is smaller than the sum of its proper divisors (1723514891142).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1339661097978 is a wasteful number, since it uses less digits than its factorization.

1339661097978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11390422.

The product of its (nonzero) digits is 92588832, while the sum is 69.

The spelling of 1339661097978 in words is "one trillion, three hundred thirty-nine billion, six hundred sixty-one million, ninety-seven thousand, nine hundred seventy-eight".