31440403501426 has 16 divisors (see below), whose sum is σ = 47336595084864. Its totient is φ = 15661552226544.

The previous prime is 31440403501387. The next prime is 31440403501427. The reversal of 31440403501426 is 62410530404413.

It is not an unprimeable number, because it can be changed into a prime (31440403501427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1143621 + ... + 8011783.

It is an arithmetic number, because the mean of its divisors is an integer number (2958537192804).

Almost surely, 2^{31440403501426} is an apocalyptic number.

31440403501426 is a deficient number, since it is larger than the sum of its proper divisors (15896191583438).

31440403501426 is a wasteful number, since it uses less digits than its factorization.

31440403501426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6876705.

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 31440403501426 its reverse (62410530404413), we get a palindrome (93850933905839).

It can be divided in two parts, 3144040 and 3501426, that added together give a palindrome (6645466).

The spelling of 31440403501426 in words is "thirty-one trillion, four hundred forty billion, four hundred three million, five hundred one thousand, four hundred twenty-six".