61497180 has 144 divisors (see below), whose sum is σ = 196245504. Its totient is φ = 15569280.

The previous prime is 61497157. The next prime is 61497187. The reversal of 61497180 is 8179416.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61497187) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 574687 + ... + 574793.

It is an arithmetic number, because the mean of its divisors is an integer number (1362816).

Almost surely, 2^61497180 is an apocalyptic number.

61497180 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61497180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98122752).

61497180 is an abundant number, since it is smaller than the sum of its proper divisors (134748324).

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

61497180 is a wasteful number, since it uses less digits than its factorization.

61497180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 61497180 is about 7842.0137719848. The cubic root of 61497180 is about 394.7163054017.

The spelling of 61497180 in words is "sixty-one million, four hundred ninety-seven thousand, one hundred eighty".