61152521501 has 2 divisors, whose sum is σ = 61152521502. Its totient is φ = 61152521500.

The previous prime is 61152521491. The next prime is 61152521537. The reversal of 61152521501 is 10512525116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50424948025 + 10727573476 = 224555^2 + 103574^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61152521501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61152523501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30576260750 + 30576260751.

It is an arithmetic number, because the mean of its divisors is an integer number (30576260751).

Almost surely, 2^61152521501 is an apocalyptic number.

It is an amenable number.

61152521501 is a deficient number, since it is larger than the sum of its proper divisors (1).

61152521501 is an equidigital number, since it uses as much as digits as its factorization.

61152521501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000, while the sum is 29.

The spelling of 61152521501 in words is "sixty-one billion, one hundred fifty-two million, five hundred twenty-one thousand, five hundred one".