Search a number
-
+
16490378986 = 28245189493
BaseRepresentation
bin11110101101110011…
…10011011011101010
31120120020120001022021
433112321303123222
5232233014111421
611324154015054
71122434623444
oct172671633352
946506501267
1016490378986
116aa2430894
12324271748a
13172a550103
14b26141494
15667aad341
hex3d6e736ea

16490378986 has 4 divisors (see below), whose sum is σ = 24735568482. Its totient is φ = 8245189492.

The previous prime is 16490378963. The next prime is 16490379067. The reversal of 16490378986 is 68987309461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68987309461 = 79855329923.

It can be written as a sum of positive squares in only one way, i.e., 12148227961 + 4342151025 = 110219^2 + 65895^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4122594745 + ... + 4122594748.

Almost surely, 216490378986 is an apocalyptic number.

16490378986 is a deficient number, since it is larger than the sum of its proper divisors (8245189496).

16490378986 is an equidigital number, since it uses as much as digits as its factorization.

16490378986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8245189495.

The product of its (nonzero) digits is 15676416, while the sum is 61.

The spelling of 16490378986 in words is "sixteen billion, four hundred ninety million, three hundred seventy-eight thousand, nine hundred eighty-six".

Divisors: 1 2 8245189493 16490378986