1620386145278 has 8 divisors (see below), whose sum is σ = 2457889097040. Its totient is φ = 801089779600.

The previous prime is 1620386145277. The next prime is 1620386145293. The reversal of 1620386145278 is 8725416830261.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620386145277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4551646298 + ... + 4551646653.

It is an arithmetic number, because the mean of its divisors is an integer number (307236137130).

Almost surely, 2^{1620386145278} is an apocalyptic number.

1620386145278 is a deficient number, since it is larger than the sum of its proper divisors (837502951762).

1620386145278 is an equidigital number, since it uses as much as digits as its factorization.

1620386145278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9103293042.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 1620386145278 in words is "one trillion, six hundred twenty billion, three hundred eighty-six million, one hundred forty-five thousand, two hundred seventy-eight".