61620305 has 8 divisors (see below), whose sum is σ = 74065344. Its totient is φ = 49215600.

The previous prime is 61620269. The next prime is 61620341. The reversal of 61620305 is 50302616.

It is an interprime number because it is at equal distance from previous prime (61620269) and next prime (61620341).

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

It is not a de Polignac number, because 61620305 - 2⁶ = 61620241 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, 6611 + ... + 12920.

It is an arithmetic number, because the mean of its divisors is an integer number (9258168).

Almost surely, 2^61620305 is an apocalyptic number.

It is an amenable number.

61620305 is a deficient number, since it is larger than the sum of its proper divisors (12445039).

61620305 is a wasteful number, since it uses less digits than its factorization.

61620305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20167.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 61620305 is about 7849.8601898378. The cubic root of 61620305 is about 394.9795535002.

The spelling of 61620305 in words is "sixty-one million, six hundred twenty thousand, three hundred five".