1375561439890 has 32 divisors (see below), whose sum is σ = 2706287034240. Its totient is φ = 499244054400.

The previous prime is 1375561439887. The next prime is 1375561439927. The reversal of 1375561439890 is 989341655731.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11943750 + ... + 12058369.

It is an arithmetic number, because the mean of its divisors is an integer number (84571469820).

Almost surely, 2^{1375561439890} is an apocalyptic number.

1375561439890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1375561439890 is a deficient number, since it is larger than the sum of its proper divisors (1330725594350).

1375561439890 is a wasteful number, since it uses less digits than its factorization.

1375561439890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24002658.

The product of its (nonzero) digits is 24494400, while the sum is 61.

The spelling of 1375561439890 in words is "one trillion, three hundred seventy-five billion, five hundred sixty-one million, four hundred thirty-nine thousand, eight hundred ninety".