61749450 has 72 divisors (see below), whose sum is σ = 189609888. Its totient is φ = 14113440.

The previous prime is 61749437. The next prime is 61749461. The reversal of 61749450 is 5494716.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6652 + ... + 12951.

Almost surely, 2^61749450 is an apocalyptic number.

61749450 is an abundant number, since it is smaller than the sum of its proper divisors (127860438).

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

61749450 is a wasteful number, since it uses less digits than its factorization.

61749450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19628 (or 19620 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 61749450 is about 7858.0818270110. The cubic root of 61749450 is about 395.2552961591.

The spelling of 61749450 in words is "sixty-one million, seven hundred forty-nine thousand, four hundred fifty".