61001055551 has 8 divisors (see below), whose sum is σ = 61340764320. Its totient is φ = 60662163712.

The previous prime is 61001055527. The next prime is 61001055569. The reversal of 61001055551 is 15555010016.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 61001055551 - 2²⁶ = 60933946687 is a prime.

It is a super-2 number, since 2×61001055551² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61001055581) 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 7 ways as a sum of consecutive naturals, for example, 54170 + ... + 353463.

It is an arithmetic number, because the mean of its divisors is an integer number (7667595540).

Almost surely, 2^61001055551 is an apocalyptic number.

61001055551 is a deficient number, since it is larger than the sum of its proper divisors (339708769).

61001055551 is a wasteful number, since it uses less digits than its factorization.

61001055551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408465.

The product of its (nonzero) digits is 3750, while the sum is 29.

Adding to 61001055551 its reverse (15555010016), we get a palindrome (76556065567).

The spelling of 61001055551 in words is "sixty-one billion, one million, fifty-five thousand, five hundred fifty-one".