61017551053 has 4 divisors (see below), whose sum is σ = 64606818780. Its totient is φ = 57428283328.

The previous prime is 61017551027. The next prime is 61017551059. The reversal of 61017551053 is 35015571016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26452420164 + 34565130889 = 162642^2 + 185917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61017551053 is a prime.

It is a super-2 number, since 2×61017551053² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61017551059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1794633838 + ... + 1794633871.

It is an arithmetic number, because the mean of its divisors is an integer number (16151704695).

Almost surely, 2^61017551053 is an apocalyptic number.

It is an amenable number.

61017551053 is a deficient number, since it is larger than the sum of its proper divisors (3589267727).

61017551053 is a wasteful number, since it uses less digits than its factorization.

61017551053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3589267726.

The product of its (nonzero) digits is 15750, while the sum is 34.

The spelling of 61017551053 in words is "sixty-one billion, seventeen million, five hundred fifty-one thousand, fifty-three".