2137657021373 has 4 divisors (see below), whose sum is σ = 2263401552060. Its totient is φ = 2011912490688.

The previous prime is 2137657021369. The next prime is 2137657021387. The reversal of 2137657021373 is 3731207567312.

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 897790360324 + 1239866661049 = 947518^2 + 1113493^2 .

It is a cyclic number.

It is not a de Polignac number, because 2137657021373 - 2² = 2137657021369 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 (2137657021343) 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, 62872265318 + ... + 62872265351.

It is an arithmetic number, because the mean of its divisors is an integer number (565850388015).

Almost surely, 2^{2137657021373} is an apocalyptic number.

It is an amenable number.

2137657021373 is a deficient number, since it is larger than the sum of its proper divisors (125744530687).

2137657021373 is a wasteful number, since it uses less digits than its factorization.

2137657021373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125744530686.

The product of its (nonzero) digits is 1111320, while the sum is 47.

The spelling of 2137657021373 in words is "two trillion, one hundred thirty-seven billion, six hundred fifty-seven million, twenty-one thousand, three hundred seventy-three".