611401321544 has 32 divisors (see below), whose sum is σ = 1235174687040. Its totient is φ = 282044808000.

The previous prime is 611401321513. The next prime is 611401321547. The reversal of 611401321544 is 445123104116.

It is a self number, because there is not a number n which added to its sum of digits gives 611401321544.

It is not an unprimeable number, because it can be changed into a prime (611401321547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1252532 + ... + 1670819.

It is an arithmetic number, because the mean of its divisors is an integer number (38599208970).

Almost surely, 2^611401321544 is an apocalyptic number.

It is an amenable number.

611401321544 is an abundant number, since it is smaller than the sum of its proper divisors (623773365496).

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

611401321544 is a wasteful number, since it uses less digits than its factorization.

611401321544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925381 (or 2925377 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 611401321544 in words is "six hundred eleven billion, four hundred one million, three hundred twenty-one thousand, five hundred forty-four".