61547490 has 24 divisors (see below), whose sum is σ = 160023708. Its totient is φ = 16412640.

The previous prime is 61547489. The next prime is 61547501. The reversal of 61547490 is 9474516.

It can be written as a sum of positive squares in 2 ways, for example, as 60980481 + 567009 = 7809^2 + 753^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 341841 + ... + 342020.

Almost surely, 2^61547490 is an apocalyptic number.

61547490 is an abundant number, since it is smaller than the sum of its proper divisors (98476218).

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

61547490 is a wasteful number, since it uses less digits than its factorization.

61547490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683874 (or 683871 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 61547490 is about 7845.2208381919. The cubic root of 61547490 is about 394.8239133959.

The spelling of 61547490 in words is "sixty-one million, five hundred forty-seven thousand, four hundred ninety".