61553077 has 2 divisors, whose sum is σ = 61553078. Its totient is φ = 61553076.

The previous prime is 61553069. The next prime is 61553111. The reversal of 61553077 is 77035516.

It is an a-pointer prime, because the next prime (61553111) can be obtained adding 61553077 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57062916 + 4490161 = 7554^2 + 2119^2 .

It is a cyclic number.

It is not a de Polignac number, because 61553077 - 2³ = 61553069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61553377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30776538 + 30776539.

It is an arithmetic number, because the mean of its divisors is an integer number (30776539).

Almost surely, 2^61553077 is an apocalyptic number.

It is an amenable number.

61553077 is a deficient number, since it is larger than the sum of its proper divisors (1).

61553077 is an equidigital number, since it uses as much as digits as its factorization.

61553077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22050, while the sum is 34.

The square root of 61553077 is about 7845.5769067673. The cubic root of 61553077 is about 394.8358598048.

It can be divided in two parts, 6155 and 3077, that multiplied together give a triangular number (18938935 = T₆₁₅₄).

The spelling of 61553077 in words is "sixty-one million, five hundred fifty-three thousand, seventy-seven".