2157236587145 has 8 divisors (see below), whose sum is σ = 2589706710720. Its totient is φ = 1725107398960.

The previous prime is 2157236587097. The next prime is 2157236587147. The reversal of 2157236587145 is 5417856327512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2157236587145 - 2⁶ = 2157236587081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2157236587147) 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, 85219925 + ... + 85245234.

It is an arithmetic number, because the mean of its divisors is an integer number (323713338840).

Almost surely, 2^{2157236587145} is an apocalyptic number.

It is an amenable number.

2157236587145 is a deficient number, since it is larger than the sum of its proper divisors (432470123575).

2157236587145 is a wasteful number, since it uses less digits than its factorization.

2157236587145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170467695.

The product of its digits is 14112000, while the sum is 56.

The spelling of 2157236587145 in words is "two trillion, one hundred fifty-seven billion, two hundred thirty-six million, five hundred eighty-seven thousand, one hundred forty-five".