61512812 has 6 divisors (see below), whose sum is σ = 107647428. Its totient is φ = 30756404.

The previous prime is 61512809. The next prime is 61512839. The reversal of 61512812 is 21821516.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7689098 + ... + 7689105.

It is an arithmetic number, because the mean of its divisors is an integer number (17941238).

Almost surely, 2^61512812 is an apocalyptic number.

It is an amenable number.

61512812 is a deficient number, since it is larger than the sum of its proper divisors (46134616).

61512812 is a wasteful number, since it uses less digits than its factorization.

61512812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15378207 (or 15378205 counting only the distinct ones).

The product of its digits is 960, while the sum is 26.

The square root of 61512812 is about 7843.0103914250. The cubic root of 61512812 is about 394.7497469490.

The spelling of 61512812 in words is "sixty-one million, five hundred twelve thousand, eight hundred twelve".