61554455 has 16 divisors (see below), whose sum is σ = 74840544. Its totient is φ = 48599040.

The previous prime is 61554431. The next prime is 61554497. The reversal of 61554455 is 55445516.

It is not a de Polignac number, because 61554455 - 2¹⁶ = 61488919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218915 + ... + 219195.

It is an arithmetic number, because the mean of its divisors is an integer number (4677534).

Almost surely, 2^61554455 is an apocalyptic number.

61554455 is a deficient number, since it is larger than the sum of its proper divisors (13286089).

61554455 is a wasteful number, since it uses less digits than its factorization.

61554455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706.

The product of its digits is 60000, while the sum is 35.

The square root of 61554455 is about 7845.6647264588. The cubic root of 61554455 is about 394.8388062037.

The spelling of 61554455 in words is "sixty-one million, five hundred fifty-four thousand, four hundred fifty-five".