611553325440 has 128 divisors (see below), whose sum is σ = 1959427548000. Its totient is φ = 162235809792.

The previous prime is 611553325423. The next prime is 611553325457. The reversal of 611553325440 is 44523355116.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (611553325423) and next prime (611553325457).

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454615 + ... + 1195734.

Almost surely, 2^611553325440 is an apocalyptic number.

611553325440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

611553325440 is an abundant number, since it is smaller than the sum of its proper divisors (1347874222560).

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

611553325440 is a wasteful number, since it uses less digits than its factorization.

611553325440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650564 (or 1650552 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 611553325440 in words is "six hundred eleven billion, five hundred fifty-three million, three hundred twenty-five thousand, four hundred forty".