209376390146 has 48 divisors (see below), whose sum is σ = 398858074560. Its totient is φ = 81512817120.

The previous prime is 209376390121. The next prime is 209376390149. The reversal of 209376390146 is 641093673902.

It is a junction number, because it is equal to n+sod(n) for n = 209376390094 and 209376390103.

It is not an unprimeable number, because it can be changed into a prime (209376390149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1348256 + ... + 1495508.

It is an arithmetic number, because the mean of its divisors is an integer number (8309543220).

Almost surely, 2^209376390146 is an apocalyptic number.

209376390146 is a deficient number, since it is larger than the sum of its proper divisors (189481684414).

209376390146 is a wasteful number, since it uses less digits than its factorization.

209376390146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148599 (or 148592 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 50.

The spelling of 209376390146 in words is "two hundred nine billion, three hundred seventy-six million, three hundred ninety thousand, one hundred forty-six".