61455000 has 160 divisors (see below), whose sum is σ = 204122160. Its totient is φ = 15360000.

The previous prime is 61454993. The next prime is 61455001. The reversal of 61455000 is 55416.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61455001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 254880 + ... + 255120.

Almost surely, 2^61455000 is an apocalyptic number.

61455000 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 61455000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102061080).

61455000 is an abundant number, since it is smaller than the sum of its proper divisors (142667160).

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

61455000 is a wasteful number, since it uses less digits than its factorization.

61455000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 61455000 is about 7839.3239504437. The cubic root of 61455000 is about 394.6260414163.

The spelling of 61455000 in words is "sixty-one million, four hundred fifty-five thousand".