157612132321 has 6 divisors (see below), whose sum is σ = 183344725410. Its totient is φ = 135096113376.

The previous prime is 157612132297. The next prime is 157612132339. The reversal of 157612132321 is 123231216751.

It can be written as a sum of positive squares in only one way, i.e., 150959446225 + 6652686096 = 388535^2 + 81564^2 .

It is not a de Polignac number, because 157612132321 - 2⁷ = 157612132193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157612132121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1608287016 + ... + 1608287113.

It is an arithmetic number, because the mean of its divisors is an integer number (30557454235).

Almost surely, 2^157612132321 is an apocalyptic number.

It is an amenable number.

157612132321 is a deficient number, since it is larger than the sum of its proper divisors (25732593089).

157612132321 is an equidigital number, since it uses as much as digits as its factorization.

157612132321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216574143 (or 3216574136 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The spelling of 157612132321 in words is "one hundred fifty-seven billion, six hundred twelve million, one hundred thirty-two thousand, three hundred twenty-one".