137878021670399 has 8 divisors (see below), whose sum is σ = 138234822098880. Its totient is φ = 137521233336096.

The previous prime is 137878021670387. The next prime is 137878021670491. The reversal of 137878021670399 is 993076120878731.

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

It is a cyclic number.

It is not a de Polignac number, because 137878021670399 - 2⁸ = 137878021670143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137878021670999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20033882 + ... + 26021384.

It is an arithmetic number, because the mean of its divisors is an integer number (17279352762360).

Almost surely, 2^{137878021670399} is an apocalyptic number.

137878021670399 is a deficient number, since it is larger than the sum of its proper divisors (356800428481).

137878021670399 is an equidigital number, since it uses as much as digits as its factorization.

137878021670399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6047089.

The product of its (nonzero) digits is 192036096, while the sum is 71.

The spelling of 137878021670399 in words is "one hundred thirty-seven trillion, eight hundred seventy-eight billion, twenty-one million, six hundred seventy thousand, three hundred ninety-nine".