61995490 has 8 divisors (see below), whose sum is σ = 111591900. Its totient is φ = 24798192.

The previous prime is 61995463. The next prime is 61995497. The reversal of 61995490 is 9459916.

It can be written as a sum of positive squares in 2 ways, for example, as 61952641 + 42849 = 7871^2 + 207^2 .

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

It is not an unprimeable number, because it can be changed into a prime (61995497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3099765 + ... + 3099784.

Almost surely, 2^61995490 is an apocalyptic number.

61995490 is a deficient number, since it is larger than the sum of its proper divisors (49596410).

61995490 is a wasteful number, since it uses less digits than its factorization.

61995490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6199556.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 61995490 is about 7873.7214835172. The cubic root of 61995490 is about 395.7795639121.

The spelling of 61995490 in words is "sixty-one million, nine hundred ninety-five thousand, four hundred ninety".