61512464 has 40 divisors (see below), whose sum is σ = 131496792. Its totient is φ = 27694080.

The previous prime is 61512433. The next prime is 61512467. The reversal of 61512464 is 46421516.

It can be written as a sum of positive squares in 4 ways, for example, as 547600 + 60964864 = 740^2 + 7808^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61512467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4922 + ... + 12134.

Almost surely, 2^61512464 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61512464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65748396).

61512464 is an abundant number, since it is smaller than the sum of its proper divisors (69984328).

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

61512464 is a wasteful number, since it uses less digits than its factorization.

61512464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7275 (or 7269 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 61512464 is about 7842.9882060347. The cubic root of 61512464 is about 394.7490025341.

The spelling of 61512464 in words is "sixty-one million, five hundred twelve thousand, four hundred sixty-four".