61473804545557 has 8 divisors (see below), whose sum is σ = 63010627431192. Its totient is φ = 59974443391840.

The previous prime is 61473804545551. The next prime is 61473804545579. The reversal of 61473804545557 is 75554540837416.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30666409251076 + 30807395294481 = 5537726^2 + 5550441^2 .

It is a de Polignac number, because none of the positive numbers 2^k-61473804545557 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 (61473804545551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445904038 + ... + 446041879.

It is an arithmetic number, because the mean of its divisors is an integer number (7876328428899).

Almost surely, 2^{61473804545557} is an apocalyptic number.

It is an amenable number.

61473804545557 is a deficient number, since it is larger than the sum of its proper divisors (1536822885635).

61473804545557 is an frugal number, since it uses more digits than its factorization.

61473804545557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891946040 (or 891945958 counting only the distinct ones).

The product of its (nonzero) digits is 282240000, while the sum is 64.

The spelling of 61473804545557 in words is "sixty-one trillion, four hundred seventy-three billion, eight hundred four million, five hundred forty-five thousand, five hundred fifty-seven".