61183567537 has 2 divisors, whose sum is σ = 61183567538. Its totient is φ = 61183567536.

The previous prime is 61183567517. The next prime is 61183567603. The reversal of 61183567537 is 73576538116.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44210949696 + 16972617841 = 210264^2 + 130279^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61183567537 is a prime.

It is not a weakly prime, because it can be changed into another prime (61183567517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30591783768 + 30591783769.

It is an arithmetic number, because the mean of its divisors is an integer number (30591783769).

Almost surely, 2^61183567537 is an apocalyptic number.

It is an amenable number.

61183567537 is a deficient number, since it is larger than the sum of its proper divisors (1).

61183567537 is an equidigital number, since it uses as much as digits as its factorization.

61183567537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 52.

The spelling of 61183567537 in words is "sixty-one billion, one hundred eighty-three million, five hundred sixty-seven thousand, five hundred thirty-seven".