61001560 has 16 divisors (see below), whose sum is σ = 137253600. Its totient is φ = 24400608.

The previous prime is 61001531. The next prime is 61001573. The reversal of 61001560 is 6510016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 762480 + ... + 762559.

It is an arithmetic number, because the mean of its divisors is an integer number (8578350).

Almost surely, 2^61001560 is an apocalyptic number.

It is an amenable number.

61001560 is an abundant number, since it is smaller than the sum of its proper divisors (76252040).

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

61001560 is a wasteful number, since it uses less digits than its factorization.

61001560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525050 (or 1525046 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 61001560 is about 7810.3495440345. The cubic root of 61001560 is about 393.6530739841.

Adding to 61001560 its reverse (6510016), we get a palindrome (67511576).

The spelling of 61001560 in words is "sixty-one million, one thousand, five hundred sixty".