61012512 has 72 divisors (see below), whose sum is σ = 189287280. Its totient is φ = 18487680.

The previous prime is 61012499. The next prime is 61012513. The reversal of 61012512 is 21521016.

61012512 is a `hidden beast` number, since 610 + 1 + 2 + 51 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (61012513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6462 + ... + 12797.

It is an arithmetic number, because the mean of its divisors is an integer number (2628990).

Almost surely, 2^61012512 is an apocalyptic number.

It is an amenable number.

61012512 is an abundant number, since it is smaller than the sum of its proper divisors (128274768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61012512 is a wasteful number, since it uses less digits than its factorization.

61012512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19286 (or 19275 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 61012512 is about 7811.0506335576. The cubic root of 61012512 is about 393.6766309253.

Adding to 61012512 its reverse (21521016), we get a palindrome (82533528).

The spelling of 61012512 in words is "sixty-one million, twelve thousand, five hundred twelve".