61917450 has 96 divisors (see below), whose sum is σ = 177429120. Its totient is φ = 13996800.

The previous prime is 61917439. The next prime is 61917461. The reversal of 61917450 is 5471916.

It is an interprime number because it is at equal distance from previous prime (61917439) and next prime (61917461).

It is a super-2 number, since 2×61917450² = 7667541229005000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 114180 + ... + 114720.

It is an arithmetic number, because the mean of its divisors is an integer number (1848220).

Almost surely, 2^61917450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61917450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88714560).

61917450 is an abundant number, since it is smaller than the sum of its proper divisors (115511670).

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

61917450 is a wasteful number, since it uses less digits than its factorization.

61917450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 672 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 61917450 is about 7868.7641977632. The cubic root of 61917450 is about 395.6134249113.

The spelling of 61917450 in words is "sixty-one million, nine hundred seventeen thousand, four hundred fifty".