137742785421 has 16 divisors (see below), whose sum is σ = 184037970240. Its totient is φ = 91638166400.

The previous prime is 137742785419. The next prime is 137742785459. The reversal of 137742785421 is 124587247731.

It is a cyclic number.

It is not a de Polignac number, because 137742785421 - 2¹ = 137742785419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137742785221) 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, 6306706 + ... + 6328508.

It is an arithmetic number, because the mean of its divisors is an integer number (11502373140).

Almost surely, 2^137742785421 is an apocalyptic number.

It is an amenable number.

137742785421 is a deficient number, since it is larger than the sum of its proper divisors (46295184819).

137742785421 is a wasteful number, since it uses less digits than its factorization.

137742785421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26076.

The product of its digits is 2634240, while the sum is 51.

The spelling of 137742785421 in words is "one hundred thirty-seven billion, seven hundred forty-two million, seven hundred eighty-five thousand, four hundred twenty-one".