61151905 has 16 divisors (see below), whose sum is σ = 74859840. Its totient is φ = 47944512.

The previous prime is 61151903. The next prime is 61151911. The reversal of 61151905 is 50915116.

It is a cyclic number.

It is not a de Polignac number, because 61151905 - 2¹ = 61151903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61151903) 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, 92466 + ... + 93124.

It is an arithmetic number, because the mean of its divisors is an integer number (4678740).

Almost surely, 2^61151905 is an apocalyptic number.

It is an amenable number.

61151905 is a deficient number, since it is larger than the sum of its proper divisors (13707935).

61151905 is a wasteful number, since it uses less digits than its factorization.

61151905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 61151905 is about 7819.9683503196. The cubic root of 61151905 is about 393.9762089786.

The spelling of 61151905 in words is "sixty-one million, one hundred fifty-one thousand, nine hundred five".