61279281267 has 16 divisors (see below), whose sum is σ = 84097659552. Its totient is φ = 39661712640.

The previous prime is 61279281253. The next prime is 61279281281. The reversal of 61279281267 is 76218297216.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61279281253) and next prime (61279281281).

It is not a de Polignac number, because 61279281267 - 2¹⁰ = 61279280243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61279281247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 553284 + ... + 654737.

It is an arithmetic number, because the mean of its divisors is an integer number (5256103722).

Almost surely, 2^61279281267 is an apocalyptic number.

61279281267 is a deficient number, since it is larger than the sum of its proper divisors (22818378285).

61279281267 is a wasteful number, since it uses less digits than its factorization.

61279281267 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1208518.

The product of its digits is 1016064, while the sum is 51.

The spelling of 61279281267 in words is "sixty-one billion, two hundred seventy-nine million, two hundred eighty-one thousand, two hundred sixty-seven".