1939415531641 has 45 divisors (see below), whose sum is σ = 2293911164301. Its totient is φ = 1639603397376.

The previous prime is 1939415531611. The next prime is 1939415531659. The reversal of 1939415531641 is 1461355149391.

It is a happy number.

The square root of 1939415531641 is 1392629.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 445984888041 + 1493430643600 = 667821^2 + 1222060^2 .

It is not a de Polignac number, because 1939415531641 - 2²⁷ = 1939281313913 is a prime.

It is a super-2 number, since 2×1939415531641² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1939415531611) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 6619165491 + ... + 6619165783.

Almost surely, 2^{1939415531641} is an apocalyptic number.

1939415531641 is the 1392629-th square number.

1939415531641 is the 696315-th centered octagonal number.

It is an amenable number.

1939415531641 is a deficient number, since it is larger than the sum of its proper divisors (354495632660).

1939415531641 is an frugal number, since it uses more digits than its factorization.

1939415531641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 808 (or 397 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 52.

The spelling of 1939415531641 in words is "one trillion, nine hundred thirty-nine billion, four hundred fifteen million, five hundred thirty-one thousand, six hundred forty-one".