61157266617133 has 4 divisors (see below), whose sum is σ = 61342031773408. Its totient is φ = 60972501460860.

The previous prime is 61157266617101. The next prime is 61157266617143. The reversal of 61157266617133 is 33171666275116.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61157266617133 - 2⁵ = 61157266617101 is a prime.

It is a super-2 number, since 2×61157266617133² (a number of 28 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 (61157266617143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92382577641 + ... + 92382578302.

It is an arithmetic number, because the mean of its divisors is an integer number (15335507943352).

Almost surely, 2^{61157266617133} is an apocalyptic number.

It is an amenable number.

61157266617133 is a deficient number, since it is larger than the sum of its proper divisors (184765156275).

61157266617133 is a wasteful number, since it uses less digits than its factorization.

61157266617133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184765156274.

The product of its digits is 5715360, while the sum is 55.

The spelling of 61157266617133 in words is "sixty-one trillion, one hundred fifty-seven billion, two hundred sixty-six million, six hundred seventeen thousand, one hundred thirty-three".