61540835 has 16 divisors (see below), whose sum is σ = 75513600. Its totient is φ = 48132576.

The previous prime is 61540819. The next prime is 61540837. The reversal of 61540835 is 53804516.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 61540835 - 2⁴ = 61540819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61540837) 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, 66506 + ... + 67424.

It is an arithmetic number, because the mean of its divisors is an integer number (4719600).

Almost surely, 2^61540835 is an apocalyptic number.

61540835 is a deficient number, since it is larger than the sum of its proper divisors (13972765).

61540835 is a wasteful number, since it uses less digits than its factorization.

61540835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1210.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 61540835 is about 7844.7966831525. The cubic root of 61540835 is about 394.8096823912.

The spelling of 61540835 in words is "sixty-one million, five hundred forty thousand, eight hundred thirty-five".