1641631434 has 32 divisors (see below), whose sum is σ = 3348423360. Its totient is φ = 536370432.

The previous prime is 1641631393. The next prime is 1641631471. The reversal of 1641631434 is 4341361461.

It is a junction number, because it is equal to n+sod(n) for n = 1641631395 and 1641631404.

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, 471769 + ... + 475235.

It is an arithmetic number, because the mean of its divisors is an integer number (104638230).

Almost surely, 2^1641631434 is an apocalyptic number.

1641631434 is an abundant number, since it is smaller than the sum of its proper divisors (1706791926).

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

1641631434 is a wasteful number, since it uses less digits than its factorization.

1641631434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5014.

The product of its digits is 20736, while the sum is 33.

The square root of 1641631434 is about 40517.0511513363. The cubic root of 1641631434 is about 1179.6646164538.

Adding to 1641631434 its reverse (4341361461), we get a palindrome (5982992895).

The spelling of 1641631434 in words is "one billion, six hundred forty-one million, six hundred thirty-one thousand, four hundred thirty-four".