61909755 has 16 divisors (see below), whose sum is σ = 99221760. Its totient is φ = 32963168.

The previous prime is 61909753. The next prime is 61909781. The reversal of 61909755 is 55790916.

It is a cyclic number.

It is not a de Polignac number, because 61909755 - 2¹ = 61909753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61909753) 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, 6754 + ... + 13016.

It is an arithmetic number, because the mean of its divisors is an integer number (6201360).

Almost surely, 2^61909755 is an apocalyptic number.

61909755 is a deficient number, since it is larger than the sum of its proper divisors (37312005).

61909755 is a wasteful number, since it uses less digits than its factorization.

61909755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6930.

The product of its (nonzero) digits is 85050, while the sum is 42.

The square root of 61909755 is about 7868.2752239611. The cubic root of 61909755 is about 395.5970355013.

The spelling of 61909755 in words is "sixty-one million, nine hundred nine thousand, seven hundred fifty-five".