611401203553 has 16 divisors (see below), whose sum is σ = 701392608000. Its totient is φ = 522075646656.

The previous prime is 611401203541. The next prime is 611401203593. The reversal of 611401203553 is 355302104116.

It is a cyclic number.

It is not a de Polignac number, because 611401203553 - 2²⁵ = 611367649121 is a prime.

It is a super-2 number, since 2×611401203553² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (611401203503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1805323 + ... + 2117071.

It is an arithmetic number, because the mean of its divisors is an integer number (43837038000).

Almost surely, 2^611401203553 is an apocalyptic number.

It is an amenable number.

611401203553 is a deficient number, since it is larger than the sum of its proper divisors (89991404447).

611401203553 is a wasteful number, since it uses less digits than its factorization.

611401203553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312816.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 611401203553 its reverse (355302104116), we get a palindrome (966703307669).

The spelling of 611401203553 in words is "six hundred eleven billion, four hundred one million, two hundred three thousand, five hundred fifty-three".