61611407740 has 24 divisors (see below), whose sum is σ = 129422008800. Its totient is φ = 24637315008.

The previous prime is 61611407731. The next prime is 61611407813. The reversal of 61611407740 is 4770411616.

It is a self number, because there is not a number n which added to its sum of digits gives 61611407740.

It is a congruent 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, 383040 + ... + 519559.

It is an arithmetic number, because the mean of its divisors is an integer number (5392583700).

Almost surely, 2^61611407740 is an apocalyptic number.

It is an amenable number.

61611407740 is an abundant number, since it is smaller than the sum of its proper divisors (67810601060).

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

61611407740 is a wasteful number, since it uses less digits than its factorization.

61611407740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906021 (or 906019 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The spelling of 61611407740 in words is "sixty-one billion, six hundred eleven million, four hundred seven thousand, seven hundred forty".