815418861412 has 36 divisors (see below), whose sum is σ = 1463012024320. Its totient is φ = 397642340592.

The previous prime is 815418861377. The next prime is 815418861427. The reversal of 815418861412 is 214168814518.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1537789 + ... + 1998907.

Almost surely, 2^815418861412 is an apocalyptic number.

It is an amenable number.

815418861412 is a deficient number, since it is larger than the sum of its proper divisors (647593162908).

815418861412 is a wasteful number, since it uses less digits than its factorization.

815418861412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461368 (or 461307 counting only the distinct ones).

The product of its digits is 491520, while the sum is 49.

The spelling of 815418861412 in words is "eight hundred fifteen billion, four hundred eighteen million, eight hundred sixty-one thousand, four hundred twelve".