1641540534 has 32 divisors (see below), whose sum is σ = 3479142240. Its totient is φ = 515424000.

The previous prime is 1641540497. The next prime is 1641540541. The reversal of 1641540534 is 4350451461.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1641540495 and 1641540504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107917 + ... + 122184.

It is an arithmetic number, because the mean of its divisors is an integer number (108723195).

Almost surely, 2^1641540534 is an apocalyptic number.

1641540534 is an abundant number, since it is smaller than the sum of its proper divisors (1837601706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1641540534 is a wasteful number, since it uses less digits than its factorization.

1641540534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230176.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 1641540534 is about 40515.9293858601. The cubic root of 1641540534 is about 1179.6428426885.

Adding to 1641540534 its reverse (4350451461), we get a palindrome (5991991995).

The spelling of 1641540534 in words is "one billion, six hundred forty-one million, five hundred forty thousand, five hundred thirty-four".