1673591406978 has 32 divisors (see below), whose sum is σ = 3523435776000. Its totient is φ = 528489732816.

The previous prime is 1673591406973. The next prime is 1673591407039. The reversal of 1673591406978 is 8796041953761.

It is not an unprimeable number, because it can be changed into a prime (1673591406973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5272075 + ... + 5580497.

It is an arithmetic number, because the mean of its divisors is an integer number (110107368000).

Almost surely, 2^{1673591406978} is an apocalyptic number.

1673591406978 is an abundant number, since it is smaller than the sum of its proper divisors (1849844369022).

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

1673591406978 is a wasteful number, since it uses less digits than its factorization.

1673591406978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356046.

The product of its (nonzero) digits is 68584320, while the sum is 66.

The spelling of 1673591406978 in words is "one trillion, six hundred seventy-three billion, five hundred ninety-one million, four hundred six thousand, nine hundred seventy-eight".