61590550 has 72 divisors (see below), whose sum is σ = 139183056. Its totient is φ = 20180160.

The previous prime is 61590547. The next prime is 61590553. The reversal of 61590550 is 5509516.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61590547) and next prime (61590553).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61590553) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 55804 + ... + 56896.

It is an arithmetic number, because the mean of its divisors is an integer number (1933098).

Almost surely, 2^61590550 is an apocalyptic number.

61590550 is an abundant number, since it is smaller than the sum of its proper divisors (77592506).

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

61590550 is a wasteful number, since it uses less digits than its factorization.

61590550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 1130 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 61590550 is about 7847.9647043039. The cubic root of 61590550 is about 394.9159678103.

The spelling of 61590550 in words is "sixty-one million, five hundred ninety thousand, five hundred fifty".