126609816 has 16 divisors (see below), whose sum is σ = 316524600. Its totient is φ = 42203264.

The previous prime is 126609809. The next prime is 126609823. The reversal of 126609816 is 618906621.

It is an interprime number because it is at equal distance from previous prime (126609809) and next prime (126609823).

It is a super-3 number, since 3×126609816³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2637681 + ... + 2637728.

Almost surely, 2^126609816 is an apocalyptic number.

It is an amenable number.

126609816 is an abundant number, since it is smaller than the sum of its proper divisors (189914784).

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

126609816 is a wasteful number, since it uses less digits than its factorization.

126609816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5275418 (or 5275414 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 126609816 is about 11252.1027368221. The cubic root of 126609816 is about 502.1372724491.

The spelling of 126609816 in words is "one hundred twenty-six million, six hundred nine thousand, eight hundred sixteen".