378621672131 has 4 divisors (see below), whose sum is σ = 378768484200. Its totient is φ = 378474860064.

The previous prime is 378621672101. The next prime is 378621672133. The reversal of 378621672131 is 131276126873.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 378621672131 - 2¹⁴ = 378621655747 is a prime.

It is a super-2 number, since 2×378621672131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378621672133) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 73402166 + ... + 73407323.

It is an arithmetic number, because the mean of its divisors is an integer number (94692121050).

Almost surely, 2^378621672131 is an apocalyptic number.

378621672131 is a deficient number, since it is larger than the sum of its proper divisors (146812069).

378621672131 is a wasteful number, since it uses less digits than its factorization.

378621672131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146812068.

The product of its digits is 508032, while the sum is 47.

The spelling of 378621672131 in words is "three hundred seventy-eight billion, six hundred twenty-one million, six hundred seventy-two thousand, one hundred thirty-one".