1623947779344 has 80 divisors (see below), whose sum is σ = 4579915420224. Its totient is φ = 491746752000.

The previous prime is 1623947779331. The next prime is 1623947779357. The reversal of 1623947779344 is 4439777493261.

It is an interprime number because it is at equal distance from previous prime (1623947779331) and next prime (1623947779357).

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 395107 + ... + 1844994.

Almost surely, 2^{1623947779344} is an apocalyptic number.

It is an amenable number.

1623947779344 is an abundant number, since it is smaller than the sum of its proper divisors (2955967640880).

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

1623947779344 is a wasteful number, since it uses less digits than its factorization.

1623947779344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241496 (or 2241490 counting only the distinct ones).

The product of its digits is 192036096, while the sum is 66.

The spelling of 1623947779344 in words is "one trillion, six hundred twenty-three billion, nine hundred forty-seven million, seven hundred seventy-nine thousand, three hundred forty-four".