61152057071557 has 4 divisors (see below), whose sum is σ = 61232414571756. Its totient is φ = 61071699571360.

The previous prime is 61152057071533. The next prime is 61152057071593. The reversal of 61152057071557 is 75517075025116.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8738887857921 + 52413169213636 = 2956161^2 + 7239694^2 .

It is a cyclic number.

It is not a de Polignac number, because 61152057071557 - 2²⁷ = 61151922853829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61152057071057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40178748958 + ... + 40178750479.

It is an arithmetic number, because the mean of its divisors is an integer number (15308103642939).

Almost surely, 2^{61152057071557} is an apocalyptic number.

It is an amenable number.

61152057071557 is a deficient number, since it is larger than the sum of its proper divisors (80357500199).

61152057071557 is an equidigital number, since it uses as much as digits as its factorization.

61152057071557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80357500198.

The product of its (nonzero) digits is 2572500, while the sum is 52.

The spelling of 61152057071557 in words is "sixty-one trillion, one hundred fifty-two billion, fifty-seven million, seventy-one thousand, five hundred fifty-seven".