61490900 has 18 divisors (see below), whose sum is σ = 133435470. Its totient is φ = 24596320.

The previous prime is 61490879. The next prime is 61490911. The reversal of 61490900 is 909416.

61490900 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 3 ways, for example, as 2937796 + 58553104 = 1714^2 + 7652^2 .

It is a super-2 number, since 2×61490900² = 7562261565620000, which contains 22 as substring.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 307355 + ... + 307554.

Almost surely, 2^61490900 is an apocalyptic number.

It is an amenable number.

61490900 is an abundant number, since it is smaller than the sum of its proper divisors (71944570).

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

61490900 is a wasteful number, since it uses less digits than its factorization.

61490900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614923 (or 614916 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 61490900 is about 7841.6133544061. The cubic root of 61490900 is about 394.7028689982.

The spelling of 61490900 in words is "sixty-one million, four hundred ninety thousand, nine hundred".