61649595 has 72 divisors (see below), whose sum is σ = 126337536. Its totient is φ = 27724032.

The previous prime is 61649593. The next prime is 61649639. The reversal of 61649595 is 59594616.

It is a happy number.

61649595 is a `hidden beast` number, since 6 + 16 + 49 + 595 = 666.

It is not a de Polignac number, because 61649595 - 2¹ = 61649593 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 61649595.

It is not an unprimeable number, because it can be changed into a prime (61649593) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 160774 + ... + 161156.

It is an arithmetic number, because the mean of its divisors is an integer number (1754688).

Almost surely, 2^61649595 is an apocalyptic number.

61649595 is an abundant number, since it is smaller than the sum of its proper divisors (64687941).

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

61649595 is a wasteful number, since it uses less digits than its factorization.

61649595 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 471 counting only the distinct ones).

The product of its digits is 291600, while the sum is 45.

The square root of 61649595 is about 7851.7256065148. The cubic root of 61649595 is about 395.0421255078.

The spelling of 61649595 in words is "sixty-one million, six hundred forty-nine thousand, five hundred ninety-five".