61287650 has 24 divisors (see below), whose sum is σ = 114210324. Its totient is φ = 24468800.

The previous prime is 61287641. The next prime is 61287683. The reversal of 61287650 is 5678216.

It can be written as a sum of positive squares in 6 ways, for example, as 27636049 + 33651601 = 5257^2 + 5801^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 61287650.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40304 + ... + 41796.

Almost surely, 2^61287650 is an apocalyptic number.

61287650 is a deficient number, since it is larger than the sum of its proper divisors (52922674).

61287650 is a wasteful number, since it uses less digits than its factorization.

61287650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326 (or 2321 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 61287650 is about 7828.6429219885. The cubic root of 61287650 is about 394.2675096740.

The spelling of 61287650 in words is "sixty-one million, two hundred eighty-seven thousand, six hundred fifty".