61013455 has 4 divisors (see below), whose sum is σ = 73216152. Its totient is φ = 48810760.

The previous prime is 61013437. The next prime is 61013489. The reversal of 61013455 is 55431016.

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

It is not a de Polignac number, because 61013455 - 2¹⁷ = 60882383 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 6101341 + ... + 6101350.

It is an arithmetic number, because the mean of its divisors is an integer number (18304038).

Almost surely, 2^61013455 is an apocalyptic number.

61013455 is a deficient number, since it is larger than the sum of its proper divisors (12202697).

61013455 is a wasteful number, since it uses less digits than its factorization.

61013455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12202696.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 61013455 is about 7811.1109965228. The cubic root of 61013455 is about 393.6786591167.

The spelling of 61013455 in words is "sixty-one million, thirteen thousand, four hundred fifty-five".