378815252177 has 4 divisors (see below), whose sum is σ = 384150678336. Its totient is φ = 373479826020.

The previous prime is 378815252173. The next prime is 378815252191. The reversal of 378815252177 is 771252518873.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 771252518873 = 191 ⋅4037971303.

It is a cyclic number.

It is not a de Polignac number, because 378815252177 - 2² = 378815252173 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378815252173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2667712973 + ... + 2667713114.

It is an arithmetic number, because the mean of its divisors is an integer number (96037669584).

Almost surely, 2^378815252177 is an apocalyptic number.

It is an amenable number.

378815252177 is a deficient number, since it is larger than the sum of its proper divisors (5335426159).

378815252177 is an equidigital number, since it uses as much as digits as its factorization.

378815252177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5335426158.

The product of its digits is 6585600, while the sum is 56.

The spelling of 378815252177 in words is "three hundred seventy-eight billion, eight hundred fifteen million, two hundred fifty-two thousand, one hundred seventy-seven".