1637666214642 has 32 divisors (see below), whose sum is σ = 3640298760000. Its totient is φ = 545732662464.

The previous prime is 1637666214599. The next prime is 1637666214647. The reversal of 1637666214642 is 2464126667361.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1637666214647) 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, 4144743 + ... + 4522634.

It is an arithmetic number, because the mean of its divisors is an integer number (113759336250).

Almost surely, 2^{1637666214642} is an apocalyptic number.

1637666214642 is an abundant number, since it is smaller than the sum of its proper divisors (2002632545358).

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

1637666214642 is a wasteful number, since it uses less digits than its factorization.

1637666214642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8670887 (or 8670881 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 54.

The spelling of 1637666214642 in words is "one trillion, six hundred thirty-seven billion, six hundred sixty-six million, two hundred fourteen thousand, six hundred forty-two".