1631111549664 has 48 divisors (see below), whose sum is σ = 4300868178432. Its totient is φ = 541265708928.

The previous prime is 1631111549653. The next prime is 1631111549687. The reversal of 1631111549664 is 4669451111361.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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, 38074434 + ... + 38117249.

It is an arithmetic number, because the mean of its divisors is an integer number (89601420384).

Almost surely, 2^{1631111549664} is an apocalyptic number.

It is an amenable number.

1631111549664 is an abundant number, since it is smaller than the sum of its proper divisors (2669756628768).

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

1631111549664 is a wasteful number, since it uses less digits than its factorization.

1631111549664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76191919 (or 76191911 counting only the distinct ones).

The product of its digits is 466560, while the sum is 48.

The spelling of 1631111549664 in words is "one trillion, six hundred thirty-one billion, one hundred eleven million, five hundred forty-nine thousand, six hundred sixty-four".