61009770 has 32 divisors (see below), whose sum is σ = 155037888. Its totient is φ = 15312128.

The previous prime is 61009747. The next prime is 61009771. The reversal of 61009770 is 7790016.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (61009771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59304 + ... + 60323.

It is an arithmetic number, because the mean of its divisors is an integer number (4844934).

Almost surely, 2^61009770 is an apocalyptic number.

61009770 is an abundant number, since it is smaller than the sum of its proper divisors (94028118).

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

61009770 is a wasteful number, since it uses less digits than its factorization.

61009770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119654.

The product of its (nonzero) digits is 2646, while the sum is 30.

The square root of 61009770 is about 7810.8751110231. The cubic root of 61009770 is about 393.6707333509.

Adding to 61009770 its reverse (7790016), we get a palindrome (68799786).

The spelling of 61009770 in words is "sixty-one million, nine thousand, seven hundred seventy".