1939416645 has 32 divisors (see below), whose sum is σ = 3210326784. Its totient is φ = 999104000.

The previous prime is 1939416643. The next prime is 1939416653. The reversal of 1939416645 is 5466149391.

It is a happy number.

It is not a de Polignac number, because 1939416645 - 2¹ = 1939416643 is a prime.

It is a super-2 number, since 2×1939416645² = 7522673845806112050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1939416594 and 1939416603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1939416643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46504 + ... + 77726.

It is an arithmetic number, because the mean of its divisors is an integer number (100322712).

Almost surely, 2^1939416645 is an apocalyptic number.

1939416645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1939416645 is a deficient number, since it is larger than the sum of its proper divisors (1270910139).

1939416645 is a wasteful number, since it uses less digits than its factorization.

1939416645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31373.

The product of its digits is 699840, while the sum is 48.

The square root of 1939416645 is about 44038.8083966858. The cubic root of 1939416645 is about 1247.0686822075.

The spelling of 1939416645 in words is "one billion, nine hundred thirty-nine million, four hundred sixteen thousand, six hundred forty-five".