61995549 has 32 divisors (see below), whose sum is σ = 109126656. Its totient is φ = 30309120.

The previous prime is 61995547. The next prime is 61995559. The reversal of 61995549 is 94559916.

It is not a de Polignac number, because 61995549 - 2¹ = 61995547 is a prime.

It is a super-2 number, since 2×61995549² = 7686896191622802, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 61995498 and 61995507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61995547) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3967 + ... + 11820.

It is an arithmetic number, because the mean of its divisors is an integer number (3410208).

Almost surely, 2^61995549 is an apocalyptic number.

It is an amenable number.

61995549 is a deficient number, since it is larger than the sum of its proper divisors (47131107).

61995549 is a wasteful number, since it uses less digits than its factorization.

61995549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15825.

The product of its digits is 437400, while the sum is 48.

The square root of 61995549 is about 7873.7252301563. The cubic root of 61995549 is about 395.7796894642.

The spelling of 61995549 in words is "sixty-one million, nine hundred ninety-five thousand, five hundred forty-nine".