61510055442 has 32 divisors (see below), whose sum is σ = 134477155584. Its totient is φ = 18601438800.

The previous prime is 61510055407. The next prime is 61510055471. The reversal of 61510055442 is 24455001516.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 916648 + ... + 981459.

It is an arithmetic number, because the mean of its divisors is an integer number (4202411112).

Almost surely, 2^61510055442 is an apocalyptic number.

61510055442 is an abundant number, since it is smaller than the sum of its proper divisors (72967100142).

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

61510055442 is a wasteful number, since it uses less digits than its factorization.

61510055442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898614.

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 61510055442 its reverse (24455001516), we get a palindrome (85965056958).

The spelling of 61510055442 in words is "sixty-one billion, five hundred ten million, fifty-five thousand, four hundred forty-two".