7561385553 has 8 divisors (see below), whose sum is σ = 10407068416. Its totient is φ = 4878313200.

The previous prime is 7561385549. The next prime is 7561385561. The reversal of 7561385553 is 3555831657.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7561385553 - 2² = 7561385549 is a prime.

It is a super-5 number, since 5×7561385553⁵ (a number of 51 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7561385053) 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, 40652518 + ... + 40652703.

It is an arithmetic number, because the mean of its divisors is an integer number (1300883552).

Almost surely, 2^7561385553 is an apocalyptic number.

It is an amenable number.

7561385553 is a deficient number, since it is larger than the sum of its proper divisors (2845682863).

7561385553 is a wasteful number, since it uses less digits than its factorization.

7561385553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81305255.

The product of its digits is 1890000, while the sum is 48.

The square root of 7561385553 is about 86956.2277988184. The cubic root of 7561385553 is about 1962.7596792054.

The spelling of 7561385553 in words is "seven billion, five hundred sixty-one million, three hundred eighty-five thousand, five hundred fifty-three".