61428755 has 8 divisors (see below), whose sum is σ = 73788624. Its totient is φ = 49093600.

The previous prime is 61428743. The next prime is 61428761. The reversal of 61428755 is 55782416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61428755 - 2⁴ = 61428739 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176 + ... + 11085.

It is an arithmetic number, because the mean of its divisors is an integer number (9223578).

Almost surely, 2^61428755 is an apocalyptic number.

61428755 is a deficient number, since it is larger than the sum of its proper divisors (12359869).

61428755 is a wasteful number, since it uses less digits than its factorization.

61428755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12357.

The product of its digits is 67200, while the sum is 38.

The square root of 61428755 is about 7837.6498390780. The cubic root of 61428755 is about 394.5698570258.

The spelling of 61428755 in words is "sixty-one million, four hundred twenty-eight thousand, seven hundred fifty-five".