61323455 has 4 divisors (see below), whose sum is σ = 73588152. Its totient is φ = 49058760.

The previous prime is 61323443. The next prime is 61323499. The reversal of 61323455 is 55432316.

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

It is not a de Polignac number, because 61323455 - 2²² = 57129151 is a prime.

It is a super-2 number, since 2×61323455² = 7521132266274050, which contains 22 as substring.

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, 6132341 + ... + 6132350.

It is an arithmetic number, because the mean of its divisors is an integer number (18397038).

Almost surely, 2^61323455 is an apocalyptic number.

61323455 is a deficient number, since it is larger than the sum of its proper divisors (12264697).

61323455 is a wasteful number, since it uses less digits than its factorization.

61323455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12264696.

The product of its digits is 10800, while the sum is 29.

The square root of 61323455 is about 7830.9293829021. The cubic root of 61323455 is about 394.3442733723.

The spelling of 61323455 in words is "sixty-one million, three hundred twenty-three thousand, four hundred fifty-five".