61560577451 has 2 divisors, whose sum is σ = 61560577452. Its totient is φ = 61560577450.

The previous prime is 61560577439. The next prime is 61560577483. The reversal of 61560577451 is 15477506516.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61560577451 is a prime.

It is a super-2 number, since 2×61560577451² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61560577396 and 61560577405.

It is not a weakly prime, because it can be changed into another prime (61560567451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30780288725 + 30780288726.

It is an arithmetic number, because the mean of its divisors is an integer number (30780288726).

Almost surely, 2^61560577451 is an apocalyptic number.

61560577451 is a deficient number, since it is larger than the sum of its proper divisors (1).

61560577451 is an equidigital number, since it uses as much as digits as its factorization.

61560577451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 882000, while the sum is 47.

The spelling of 61560577451 in words is "sixty-one billion, five hundred sixty million, five hundred seventy-seven thousand, four hundred fifty-one".