378791553 has 16 divisors (see below), whose sum is σ = 577704960. Its totient is φ = 216265296.

The previous prime is 378791549. The next prime is 378791557. The reversal of 378791553 is 355197873.

It is an interprime number because it is at equal distance from previous prime (378791549) and next prime (378791557).

It is not a de Polignac number, because 378791553 - 2² = 378791549 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (378791557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19276 + ... + 33602.

It is an arithmetic number, because the mean of its divisors is an integer number (36106560).

Almost surely, 2^378791553 is an apocalyptic number.

It is an amenable number.

378791553 is a deficient number, since it is larger than the sum of its proper divisors (198913407).

378791553 is a wasteful number, since it uses less digits than its factorization.

378791553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15596.

The product of its digits is 793800, while the sum is 48.

The square root of 378791553 is about 19462.5679960277. The cubic root of 378791553 is about 723.5470245537.

The spelling of 378791553 in words is "three hundred seventy-eight million, seven hundred ninety-one thousand, five hundred fifty-three".