1631440254534 has 32 divisors (see below), whose sum is σ = 3309227571456. Its totient is φ = 536090718240.

The previous prime is 1631440254527. The next prime is 1631440254539. The reversal of 1631440254534 is 4354520441361.

It is a super-2 number, since 2×1631440254534² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631440254539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3453144 + ... + 3897060.

It is an arithmetic number, because the mean of its divisors is an integer number (103413361608).

Almost surely, 2^{1631440254534} is an apocalyptic number.

1631440254534 is an abundant number, since it is smaller than the sum of its proper divisors (1677787316922).

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

1631440254534 is a wasteful number, since it uses less digits than its factorization.

1631440254534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452620.

The product of its (nonzero) digits is 691200, while the sum is 42.

Adding to 1631440254534 its reverse (4354520441361), we get a palindrome (5985960695895).

The spelling of 1631440254534 in words is "one trillion, six hundred thirty-one billion, four hundred forty million, two hundred fifty-four thousand, five hundred thirty-four".