61276215105 has 48 divisors (see below), whose sum is σ = 121573281024. Its totient is φ = 27968595840.

The previous prime is 61276215089. The next prime is 61276215139. The reversal of 61276215105 is 50151267216.

61276215105 is a `hidden beast` number, since 6 + 1 + 27 + 621 + 5 + 1 + 0 + 5 = 666.

It is not a de Polignac number, because 61276215105 - 2⁴ = 61276215089 is a prime.

It is a super-2 number, since 2×61276215105² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61276215105.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53475 + ... + 354135.

It is an arithmetic number, because the mean of its divisors is an integer number (2532776688).

Almost surely, 2^61276215105 is an apocalyptic number.

It is an amenable number.

61276215105 is a deficient number, since it is larger than the sum of its proper divisors (60297065919).

61276215105 is a wasteful number, since it uses less digits than its factorization.

61276215105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301326 (or 301323 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 61276215105 in words is "sixty-one billion, two hundred seventy-six million, two hundred fifteen thousand, one hundred five".