1984554946491 has 16 divisors (see below), whose sum is σ = 2850382155264. Its totient is φ = 1220936812704.

The previous prime is 1984554946487. The next prime is 1984554946501. The reversal of 1984554946491 is 1946494554891.

It is not a de Polignac number, because 1984554946491 - 2² = 1984554946487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1984554946091) 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, 6681321 + ... + 6972026.

It is an arithmetic number, because the mean of its divisors is an integer number (178148884704).

Almost surely, 2^{1984554946491} is an apocalyptic number.

1984554946491 is a deficient number, since it is larger than the sum of its proper divisors (865827208773).

1984554946491 is a wasteful number, since it uses less digits than its factorization.

1984554946491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13657090.

The product of its digits is 223948800, while the sum is 69.

The spelling of 1984554946491 in words is "one trillion, nine hundred eighty-four billion, five hundred fifty-four million, nine hundred forty-six thousand, four hundred ninety-one".