61028863757 has 4 divisors (see below), whose sum is σ = 63682292640. Its totient is φ = 58375434876.

The previous prime is 61028863729. The next prime is 61028863801. The reversal of 61028863757 is 75736882016.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61028863757 - 2¹⁶ = 61028798221 is a prime.

It is a super-2 number, since 2×61028863757² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61028863699 and 61028863708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61028863157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1326714407 + ... + 1326714452.

It is an arithmetic number, because the mean of its divisors is an integer number (15920573160).

Almost surely, 2^61028863757 is an apocalyptic number.

It is an amenable number.

61028863757 is a deficient number, since it is larger than the sum of its proper divisors (2653428883).

61028863757 is a wasteful number, since it uses less digits than its factorization.

61028863757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653428882.

The product of its (nonzero) digits is 3386880, while the sum is 53.

The spelling of 61028863757 in words is "sixty-one billion, twenty-eight million, eight hundred sixty-three thousand, seven hundred fifty-seven".