61540419 has 8 divisors (see below), whose sum is σ = 82807120. Its totient is φ = 40650336.

The previous prime is 61540417. The next prime is 61540421. The reversal of 61540419 is 91404516.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61540417) and next prime (61540421).

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

It is not a de Polignac number, because 61540419 - 2¹ = 61540417 is a prime.

It is a super-2 number, since 2×61540419² = 7574446341391122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61540417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93772 + ... + 94425.

It is an arithmetic number, because the mean of its divisors is an integer number (10350890).

Almost surely, 2^61540419 is an apocalyptic number.

61540419 is a deficient number, since it is larger than the sum of its proper divisors (21266701).

61540419 is a wasteful number, since it uses less digits than its factorization.

61540419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188309.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 61540419 is about 7844.7701687175. The cubic root of 61540419 is about 394.8087927857.

The spelling of 61540419 in words is "sixty-one million, five hundred forty thousand, four hundred nineteen".