61051551040 has 112 divisors (see below), whose sum is σ = 150087403152. Its totient is φ = 23636606976.

The previous prime is 61051551023. The next prime is 61051551079. The reversal of 61051551040 is 4015515016.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1191078144 + 59860472896 = 34512^2 + 244664^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2271762 + ... + 2298478.

Almost surely, 2^61051551040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61051551040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75043701576).

61051551040 is an abundant number, since it is smaller than the sum of its proper divisors (89035852112).

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

61051551040 is a wasteful number, since it uses less digits than its factorization.

61051551040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26964 (or 26954 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 61051551040 in words is "sixty-one billion, fifty-one million, five hundred fifty-one thousand, forty".