153997742537 has 4 divisors (see below), whose sum is σ = 154978620036. Its totient is φ = 153016865040.

The previous prime is 153997742501. The next prime is 153997742579. The reversal of 153997742537 is 735247799351.

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 12733768336 + 141263974201 = 112844^2 + 375851^2 .

It is a cyclic number.

It is not a de Polignac number, because 153997742537 - 2⁸ = 153997742281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 153997742537.

It is not an unprimeable number, because it can be changed into a prime (153997745537) 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, 490438514 + ... + 490438827.

It is an arithmetic number, because the mean of its divisors is an integer number (38744655009).

Almost surely, 2^153997742537 is an apocalyptic number.

It is an amenable number.

153997742537 is a deficient number, since it is larger than the sum of its proper divisors (980877499).

153997742537 is an equidigital number, since it uses as much as digits as its factorization.

153997742537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980877498.

The product of its digits is 50009400, while the sum is 62.

The spelling of 153997742537 in words is "one hundred fifty-three billion, nine hundred ninety-seven million, seven hundred forty-two thousand, five hundred thirty-seven".