61456537 has 2 divisors, whose sum is σ = 61456538. Its totient is φ = 61456536.

The previous prime is 61456531. The next prime is 61456541. The reversal of 61456537 is 73565416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46526041 + 14930496 = 6821^2 + 3864^2 .

It is a cyclic number.

It is not a de Polignac number, because 61456537 - 2²³ = 53067929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61456496 and 61456505.

It is not a weakly prime, because it can be changed into another prime (61456531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30728268 + 30728269.

It is an arithmetic number, because the mean of its divisors is an integer number (30728269).

Almost surely, 2^61456537 is an apocalyptic number.

It is an amenable number.

61456537 is a deficient number, since it is larger than the sum of its proper divisors (1).

61456537 is an equidigital number, since it uses as much as digits as its factorization.

61456537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 37.

The square root of 61456537 is about 7839.4219812433. The cubic root of 61456537 is about 394.6293312770.

The spelling of 61456537 in words is "sixty-one million, four hundred fifty-six thousand, five hundred thirty-seven".