61853270149 has 128 divisors (see below), whose sum is σ = 78829977600. Its totient is φ = 47882016000.

The previous prime is 61853270137. The next prime is 61853270161. The reversal of 61853270149 is 94107235816.

It is an interprime number because it is at equal distance from previous prime (61853270137) and next prime (61853270161).

It is a cyclic number.

It is not a de Polignac number, because 61853270149 - 2⁵ = 61853270117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61853270099 and 61853270108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61853270189) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 871172784 + ... + 871172854.

It is an arithmetic number, because the mean of its divisors is an integer number (615859200).

It is a 2-persistent number, because it is pandigital, and so is 2⋅61853270149 = 123706540298, but 3⋅61853270149 = 185559810447 is not.

Almost surely, 2^61853270149 is an apocalyptic number.

61853270149 is the 157294-th heptagonal number.

It is an amenable number.

61853270149 is a deficient number, since it is larger than the sum of its proper divisors (16976707451).

61853270149 is a wasteful number, since it uses less digits than its factorization.

61853270149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 61853270149 in words is "sixty-one billion, eight hundred fifty-three million, two hundred seventy thousand, one hundred forty-nine".