61357805 has 4 divisors (see below), whose sum is σ = 73629372. Its totient is φ = 49086240.

The previous prime is 61357739. The next prime is 61357819. The reversal of 61357805 is 50875316.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26275876 + 35081929 = 5126^2 + 5923^2 .

It is not a de Polignac number, because 61357805 - 2¹⁴ = 61341421 is a prime.

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, 6135776 + ... + 6135785.

It is an arithmetic number, because the mean of its divisors is an integer number (18407343).

Almost surely, 2^61357805 is an apocalyptic number.

It is an amenable number.

61357805 is a deficient number, since it is larger than the sum of its proper divisors (12271567).

61357805 is a wasteful number, since it uses less digits than its factorization.

61357805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12271566.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 61357805 is about 7833.1223021219. The cubic root of 61357805 is about 394.4178895625.

The spelling of 61357805 in words is "sixty-one million, three hundred fifty-seven thousand, eight hundred five".