61423845 has 32 divisors (see below), whose sum is σ = 112637952. Its totient is φ = 27999552.

The previous prime is 61423841. The next prime is 61423847. The reversal of 61423845 is 54832416.

It is not a de Polignac number, because 61423845 - 2² = 61423841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61423841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52234 + ... + 53396.

It is an arithmetic number, because the mean of its divisors is an integer number (3519936).

Almost surely, 2^61423845 is an apocalyptic number.

It is an amenable number.

61423845 is a deficient number, since it is larger than the sum of its proper divisors (51214107).

61423845 is a wasteful number, since it uses less digits than its factorization.

61423845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681.

The product of its digits is 23040, while the sum is 33.

The square root of 61423845 is about 7837.3366011675. The cubic root of 61423845 is about 394.5593440903.

The spelling of 61423845 in words is "sixty-one million, four hundred twenty-three thousand, eight hundred forty-five".