61133751278 has 32 divisors (see below), whose sum is σ = 97965939456. Its totient is φ = 28542463488.

The previous prime is 61133751277. The next prime is 61133751331. The reversal of 61133751278 is 87215733116.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61133751277) 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, 4172201 + ... + 4186827.

It is an arithmetic number, because the mean of its divisors is an integer number (3061435608).

Almost surely, 2^61133751278 is an apocalyptic number.

61133751278 is a deficient number, since it is larger than the sum of its proper divisors (36832188178).

61133751278 is a wasteful number, since it uses less digits than its factorization.

61133751278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16808.

The product of its digits is 211680, while the sum is 44.

The spelling of 61133751278 in words is "sixty-one billion, one hundred thirty-three million, seven hundred fifty-one thousand, two hundred seventy-eight".