16461803297978 has 16 divisors (see below), whose sum is σ = 25970172950016. Its totient is φ = 7815098338320.

The previous prime is 16461803297963. The next prime is 16461803298037. The reversal of 16461803297978 is 87979230816461.

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, 2504835926 + ... + 2504842497.

It is an arithmetic number, because the mean of its divisors is an integer number (1623135809376).

Almost surely, 2^{16461803297978} is an apocalyptic number.

16461803297978 is a deficient number, since it is larger than the sum of its proper divisors (9508369652038).

16461803297978 is a wasteful number, since it uses less digits than its factorization.

16461803297978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5009678509.

The product of its (nonzero) digits is 219469824, while the sum is 71.

The spelling of 16461803297978 in words is "sixteen trillion, four hundred sixty-one billion, eight hundred three million, two hundred ninety-seven thousand, nine hundred seventy-eight".