1615378941 has 24 divisors (see below), whose sum is σ = 2656120896. Its totient is φ = 936450240.

The previous prime is 1615378931. The next prime is 1615378943. The reversal of 1615378941 is 1498735161.

1615378941 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1615378941 - 2¹⁹ = 1614854653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1615378943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 352440 + ... + 356993.

It is an arithmetic number, because the mean of its divisors is an integer number (110671704).

Almost surely, 2^1615378941 is an apocalyptic number.

1615378941 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1615378941 is a deficient number, since it is larger than the sum of its proper divisors (1040741955).

1615378941 is a wasteful number, since it uses less digits than its factorization.

1615378941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709473 (or 709470 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 1615378941 is about 40191.7770321244. Note that the first 3 decimals coincide. The cubic root of 1615378941 is about 1173.3425106803.

The spelling of 1615378941 in words is "one billion, six hundred fifteen million, three hundred seventy-eight thousand, nine hundred forty-one".