61515116 has 24 divisors (see below), whose sum is σ = 116153520. Its totient is φ = 28337472.

The previous prime is 61515101. The next prime is 61515143. The reversal of 61515116 is 61151516.

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 42395 + ... + 43821.

It is an arithmetic number, because the mean of its divisors is an integer number (4839730).

Almost surely, 2^61515116 is an apocalyptic number.

It is an amenable number.

61515116 is a deficient number, since it is larger than the sum of its proper divisors (54638404).

61515116 is a wasteful number, since it uses less digits than its factorization.

61515116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273 (or 2271 counting only the distinct ones).

The product of its digits is 900, while the sum is 26.

The square root of 61515116 is about 7843.1572724254. The cubic root of 61515116 is about 394.7546754186.

The spelling of 61515116 in words is "sixty-one million, five hundred fifteen thousand, one hundred sixteen".