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61313841749 = 223881931177
BaseRepresentation
bin111001000110100101…
…101111101001010101
312212021001210212210202
4321012211233221111
52001032320413444
644100040230245
74300262025056
oct710645575125
9185231725722
1061313841749
1124004079896
12ba71a6b385
135a21a00544
142d7917872d
1518dcc7934e
hexe4696fa55

61313841749 has 8 divisors (see below), whose sum is σ = 61597751040. Its totient is φ = 61030012896.

The previous prime is 61313841733. The next prime is 61313841773. The reversal of 61313841749 is 94714831316.

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

It is a cyclic number.

It is not a de Polignac number, because 61313841749 - 24 = 61313841733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61313841349) 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, 1951049 + ... + 1982225.

It is an arithmetic number, because the mean of its divisors is an integer number (7699718880).

Almost surely, 261313841749 is an apocalyptic number.

It is an amenable number.

61313841749 is a deficient number, since it is larger than the sum of its proper divisors (283909291).

61313841749 is a wasteful number, since it uses less digits than its factorization.

61313841749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40219.

The product of its digits is 435456, while the sum is 47.

The spelling of 61313841749 in words is "sixty-one billion, three hundred thirteen million, eight hundred forty-one thousand, seven hundred forty-nine".

Divisors: 1 223 8819 31177 1966637 6952471 274949963 61313841749