61795780 has 12 divisors (see below), whose sum is σ = 129771180. Its totient is φ = 24718304.

The previous prime is 61795759. The next prime is 61795819. The reversal of 61795780 is 8759716.

It can be written as a sum of positive squares in 2 ways, for example, as 42224004 + 19571776 = 6498^2 + 4424^2 .

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, 1544875 + ... + 1544914.

It is an arithmetic number, because the mean of its divisors is an integer number (10814265).

Almost surely, 2^61795780 is an apocalyptic number.

It is an amenable number.

61795780 is an abundant number, since it is smaller than the sum of its proper divisors (67975400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61795780 is a wasteful number, since it uses less digits than its factorization.

61795780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3089798 (or 3089796 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 61795780 is about 7861.0291947047. The cubic root of 61795780 is about 395.3541234898.

The spelling of 61795780 in words is "sixty-one million, seven hundred ninety-five thousand, seven hundred eighty".