61018538 has 16 divisors (see below), whose sum is σ = 110109120. Its totient is φ = 24774336.

The previous prime is 61018501. The next prime is 61018553. The reversal of 61018538 is 83581016.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114431 + ... + 114962.

It is an arithmetic number, because the mean of its divisors is an integer number (6881820).

Almost surely, 2^61018538 is an apocalyptic number.

61018538 is a deficient number, since it is larger than the sum of its proper divisors (49090582).

61018538 is a wasteful number, since it uses less digits than its factorization.

61018538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229421.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 61018538 is about 7811.4363595948. The cubic root of 61018538 is about 393.6895912029.

The spelling of 61018538 in words is "sixty-one million, eighteen thousand, five hundred thirty-eight".