61039555 has 4 divisors (see below), whose sum is σ = 73247472. Its totient is φ = 48831640.

The previous prime is 61039523. The next prime is 61039567. The reversal of 61039555 is 55593016.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61039555 - 2⁵ = 61039523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61039555.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6103951 + ... + 6103960.

It is an arithmetic number, because the mean of its divisors is an integer number (18311868).

Almost surely, 2^61039555 is an apocalyptic number.

61039555 is a deficient number, since it is larger than the sum of its proper divisors (12207917).

61039555 is a wasteful number, since it uses less digits than its factorization.

61039555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12207916.

The product of its (nonzero) digits is 20250, while the sum is 34.

The square root of 61039555 is about 7812.7815149280. The cubic root of 61039555 is about 393.7347863442.

The spelling of 61039555 in words is "sixty-one million, thirty-nine thousand, five hundred fifty-five".