894992906978 has 16 divisors (see below), whose sum is σ = 1400937759360. Its totient is φ = 428015856576.

The previous prime is 894992906947. The next prime is 894992906999. The reversal of 894992906978 is 879609299498.

It is a happy number.

It is a super-2 number, since 2×894992906978² (a number of 25 digits) contains 22 as substring.

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, 284426 + ... + 1367802.

It is an arithmetic number, because the mean of its divisors is an integer number (87558609960).

Almost surely, 2^894992906978 is an apocalyptic number.

894992906978 is a deficient number, since it is larger than the sum of its proper divisors (505944852382).

894992906978 is a wasteful number, since it uses less digits than its factorization.

894992906978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101361.

The product of its (nonzero) digits is 1269789696, while the sum is 80.

The spelling of 894992906978 in words is "eight hundred ninety-four billion, nine hundred ninety-two million, nine hundred six thousand, nine hundred seventy-eight".