61634454 has 48 divisors (see below), whose sum is σ = 148359600. Its totient is φ = 17000256.

The previous prime is 61634431. The next prime is 61634471. The reversal of 61634454 is 45443616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4912 + ... + 12140.

It is an arithmetic number, because the mean of its divisors is an integer number (3090825).

Almost surely, 2^61634454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61634454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74179800).

61634454 is an abundant number, since it is smaller than the sum of its proper divisors (86725146).

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

61634454 is a wasteful number, since it uses less digits than its factorization.

61634454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7277 (or 7270 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 61634454 is about 7850.7613643519. The cubic root of 61634454 is about 395.0097823780.

The spelling of 61634454 in words is "sixty-one million, six hundred thirty-four thousand, four hundred fifty-four".