61500490 has 8 divisors (see below), whose sum is σ = 110700900. Its totient is φ = 24600192.

The previous prime is 61500463. The next prime is 61500521. The reversal of 61500490 is 9400516.

61500490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 60793209 + 707281 = 7797^2 + 841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3075015 + ... + 3075034.

Almost surely, 2^61500490 is an apocalyptic number.

61500490 is a deficient number, since it is larger than the sum of its proper divisors (49200410).

61500490 is a wasteful number, since it uses less digits than its factorization.

61500490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6150056.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 61500490 is about 7842.2248118758. The cubic root of 61500490 is about 394.7233869597.

The spelling of 61500490 in words is "sixty-one million, five hundred thousand, four hundred ninety".