1383432661990 has 16 divisors (see below), whose sum is σ = 2490683271552. Its totient is φ = 553260958144.

The previous prime is 1383432661981. The next prime is 1383432661993. The reversal of 1383432661990 is 991662343831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1383432661993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13961494 + ... + 14060233.

It is an arithmetic number, because the mean of its divisors is an integer number (155667704472).

Almost surely, 2^{1383432661990} is an apocalyptic number.

1383432661990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1383432661990 is a deficient number, since it is larger than the sum of its proper divisors (1107250609562).

1383432661990 is a wasteful number, since it uses less digits than its factorization.

1383432661990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28026671.

The product of its (nonzero) digits is 5038848, while the sum is 55.

The spelling of 1383432661990 in words is "one trillion, three hundred eighty-three billion, four hundred thirty-two million, six hundred sixty-one thousand, nine hundred ninety".