157761484865 has 16 divisors (see below), whose sum is σ = 200554876368. Its totient is φ = 118722902016.

The previous prime is 157761484861. The next prime is 157761484879. The reversal of 157761484865 is 568484167751.

It is a Cunningham number, because it is equal to 397192²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 1 + 157761484864 = 1^2 + 397192^2 .

It is a cyclic number.

It is not a de Polignac number, because 157761484865 - 2² = 157761484861 is a prime.

It is a super-2 number, since 2×157761484865² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 157761484798 and 157761484807.

It is not an unprimeable number, because it can be changed into a prime (157761484861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322502 + ... + 647711.

It is an arithmetic number, because the mean of its divisors is an integer number (12534679773).

Almost surely, 2^157761484865 is an apocalyptic number.

It is an amenable number.

157761484865 is a deficient number, since it is larger than the sum of its proper divisors (42793391503).

157761484865 is a wasteful number, since it uses less digits than its factorization.

157761484865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972148.

The product of its digits is 45158400, while the sum is 62.

The spelling of 157761484865 in words is "one hundred fifty-seven billion, seven hundred sixty-one million, four hundred eighty-four thousand, eight hundred sixty-five".