61515206252 has 24 divisors (see below), whose sum is σ = 111422247552. Its totient is φ = 29685600000.

The previous prime is 61515206219. The next prime is 61515206293. The reversal of 61515206252 is 25260251516.

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 7 ways as a sum of consecutive naturals, for example, 618749 + ... + 711252.

It is an arithmetic number, because the mean of its divisors is an integer number (4642593648).

Almost surely, 2^61515206252 is an apocalyptic number.

61515206252 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

61515206252 is a deficient number, since it is larger than the sum of its proper divisors (49907041300).

61515206252 is a wasteful number, since it uses less digits than its factorization.

61515206252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330409 (or 1330407 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 61515206252 its reverse (25260251516), we get a palindrome (86775457768).

The spelling of 61515206252 in words is "sixty-one billion, five hundred fifteen million, two hundred six thousand, two hundred fifty-two".