61515448 has 16 divisors (see below), whose sum is σ = 115544880. Its totient is φ = 30703488.

The previous prime is 61515431. The next prime is 61515449. The reversal of 61515448 is 84451516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61515449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1740 + ... + 11227.

It is an arithmetic number, because the mean of its divisors is an integer number (7221555).

Almost surely, 2^61515448 is an apocalyptic number.

It is an amenable number.

61515448 is a deficient number, since it is larger than the sum of its proper divisors (54029432).

61515448 is a wasteful number, since it uses less digits than its factorization.

61515448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13566 (or 13562 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

The square root of 61515448 is about 7843.1784373429. The cubic root of 61515448 is about 394.7553855872.

The spelling of 61515448 in words is "sixty-one million, five hundred fifteen thousand, four hundred forty-eight".