137262751621 has 2 divisors, whose sum is σ = 137262751622. Its totient is φ = 137262751620.

The previous prime is 137262751603. The next prime is 137262751627. The reversal of 137262751621 is 126157262731.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123773090596 + 13489661025 = 351814^2 + 116145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-137262751621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137262751627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68631375810 + 68631375811.

It is an arithmetic number, because the mean of its divisors is an integer number (68631375811).

Almost surely, 2^137262751621 is an apocalyptic number.

It is an amenable number.

137262751621 is a deficient number, since it is larger than the sum of its proper divisors (1).

137262751621 is an equidigital number, since it uses as much as digits as its factorization.

137262751621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The spelling of 137262751621 in words is "one hundred thirty-seven billion, two hundred sixty-two million, seven hundred fifty-one thousand, six hundred twenty-one".