61140277 has 16 divisors (see below), whose sum is σ = 69281280. Its totient is φ = 53452800.

The previous prime is 61140259. The next prime is 61140293. The reversal of 61140277 is 77204116.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61140277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61140257) 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, 65349 + ... + 66277.

It is an arithmetic number, because the mean of its divisors is an integer number (4330080).

Almost surely, 2^61140277 is an apocalyptic number.

It is an amenable number.

61140277 is a deficient number, since it is larger than the sum of its proper divisors (8141003).

61140277 is a wasteful number, since it uses less digits than its factorization.

61140277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 61140277 is about 7819.2248337031. The cubic root of 61140277 is about 393.9512359448.

The spelling of 61140277 in words is "sixty-one million, one hundred forty thousand, two hundred seventy-seven".