61145531770 has 32 divisors (see below), whose sum is σ = 110702059776. Its totient is φ = 24316152000.

The previous prime is 61145531761. The next prime is 61145531801. The reversal of 61145531770 is 7713554116.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2847775 + ... + 2869165.

It is an arithmetic number, because the mean of its divisors is an integer number (3459439368).

Almost surely, 2^61145531770 is an apocalyptic number.

61145531770 is a deficient number, since it is larger than the sum of its proper divisors (49556528006).

61145531770 is a wasteful number, since it uses less digits than its factorization.

61145531770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23046.

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 61145531770 in words is "sixty-one billion, one hundred forty-five million, five hundred thirty-one thousand, seven hundred seventy".