61712550 has 96 divisors (see below), whose sum is σ = 180122400. Its totient is φ = 15482880.

The previous prime is 61712531. The next prime is 61712569. The reversal of 61712550 is 5521716.

It is an interprime number because it is at equal distance from previous prime (61712531) and next prime (61712569).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21606 + ... + 24294.

It is an arithmetic number, because the mean of its divisors is an integer number (1876275).

Almost surely, 2^61712550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61712550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90061200).

61712550 is an abundant number, since it is smaller than the sum of its proper divisors (118409850).

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

61712550 is a wasteful number, since it uses less digits than its factorization.

61712550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727 (or 2716 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 61712550 is about 7855.7335749120. The cubic root of 61712550 is about 395.1765487554.

The spelling of 61712550 in words is "sixty-one million, seven hundred twelve thousand, five hundred fifty".