61791455 has 16 divisors (see below), whose sum is σ = 84409344. Its totient is φ = 42984480.

The previous prime is 61791437. The next prime is 61791461. The reversal of 61791455 is 55419716.

It is not a de Polignac number, because 61791455 - 2⁶ = 61791391 is a prime.

It is a super-2 number, since 2×61791455² = 7636367822034050, which contains 22 as substring.

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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23159 + ... + 25688.

It is an arithmetic number, because the mean of its divisors is an integer number (5275584).

Almost surely, 2^61791455 is an apocalyptic number.

61791455 is a deficient number, since it is larger than the sum of its proper divisors (22617889).

61791455 is a wasteful number, since it uses less digits than its factorization.

61791455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48886.

The product of its digits is 37800, while the sum is 38.

The square root of 61791455 is about 7860.7540986854. The cubic root of 61791455 is about 395.3448998477.

The spelling of 61791455 in words is "sixty-one million, seven hundred ninety-one thousand, four hundred fifty-five".