1617663397090 has 16 divisors (see below), whose sum is σ = 3135778277688. Its totient is φ = 597291100416.

The previous prime is 1617663397057. The next prime is 1617663397109. The reversal of 1617663397090 is 907933667161.

It can be written as a sum of positive squares in 4 ways, for example, as 1013873789569 + 603789607521 = 1006913^2 + 777039^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6221782167 + ... + 6221782426.

Almost surely, 2^{1617663397090} is an apocalyptic number.

1617663397090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1617663397090 is a deficient number, since it is larger than the sum of its proper divisors (1518114880598).

1617663397090 is a wasteful number, since it uses less digits than its factorization.

1617663397090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12443564613.

The product of its (nonzero) digits is 7715736, while the sum is 58.

The spelling of 1617663397090 in words is "one trillion, six hundred seventeen billion, six hundred sixty-three million, three hundred ninety-seven thousand, ninety".