61115551033 has 8 divisors (see below), whose sum is σ = 64009828800. Its totient is φ = 58241029968.

The previous prime is 61115551027. The next prime is 61115551043. The reversal of 61115551033 is 33015551116.

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 a de Polignac number, because none of the positive numbers 2^k-61115551033 is a prime.

It is a super-2 number, since 2×61115551033² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61115550986 and 61115551004.

It is not an unprimeable number, because it can be changed into a prime (61115551043) 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, 4932843 + ... + 4945216.

It is an arithmetic number, because the mean of its divisors is an integer number (8001228600).

Almost surely, 2^61115551033 is an apocalyptic number.

It is an amenable number.

61115551033 is a deficient number, since it is larger than the sum of its proper divisors (2894277767).

61115551033 is a wasteful number, since it uses less digits than its factorization.

61115551033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9878351.

The product of its (nonzero) digits is 6750, while the sum is 31.

The spelling of 61115551033 in words is "sixty-one billion, one hundred fifteen million, five hundred fifty-one thousand, thirty-three".