137744742021 has 16 divisors (see below), whose sum is σ = 192820609536. Its totient is φ = 87298340976.

The previous prime is 137744741993. The next prime is 137744742029. The reversal of 137744742021 is 120247447731.

It is not a de Polignac number, because 137744742021 - 2¹⁸ = 137744479877 is a prime.

It is a super-2 number, since 2×137744742021² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137744742029) 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, 6112375 + ... + 6134868.

It is an arithmetic number, because the mean of its divisors is an integer number (12051288096).

Almost surely, 2^137744742021 is an apocalyptic number.

It is an amenable number.

137744742021 is a deficient number, since it is larger than the sum of its proper divisors (55075867515).

137744742021 is a wasteful number, since it uses less digits than its factorization.

137744742021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12247432.

The product of its (nonzero) digits is 263424, while the sum is 42.

The spelling of 137744742021 in words is "one hundred thirty-seven billion, seven hundred forty-four million, seven hundred forty-two thousand, twenty-one".