61105943497251 has 8 divisors (see below), whose sum is σ = 85762727715520. Its totient is φ = 38593227471912.

The previous prime is 61105943497241. The next prime is 61105943497363. The reversal of 61105943497251 is 15279434950116.

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

It is not a de Polignac number, because 61105943497251 - 2¹¹ = 61105943495203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57), and also a Moran number because the ratio is a prime number: 1072034096443 = 61105943497251 / (6 + 1 + 1 + 0 + 5 + 9 + 4 + 3 + 4 + 9 + 7 + 2 + 5 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61105943497191 and 61105943497200.

It is not an unprimeable number, because it can be changed into a prime (61105943497241) 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, 536017048165 + ... + 536017048278.

It is an arithmetic number, because the mean of its divisors is an integer number (10720340964440).

Almost surely, 2^{61105943497251} is an apocalyptic number.

61105943497251 is a deficient number, since it is larger than the sum of its proper divisors (24656784218269).

61105943497251 is a wasteful number, since it uses less digits than its factorization.

61105943497251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072034096465.

The product of its (nonzero) digits is 8164800, while the sum is 57.

The spelling of 61105943497251 in words is "sixty-one trillion, one hundred five billion, nine hundred forty-three million, four hundred ninety-seven thousand, two hundred fifty-one".