137778400252 has 6 divisors (see below), whose sum is σ = 241112200448. Its totient is φ = 68889200124.

The previous prime is 137778400247. The next prime is 137778400259. The reversal of 137778400252 is 252004877731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137778400259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17222300028 + ... + 17222300035.

Almost surely, 2^137778400252 is an apocalyptic number.

It is an amenable number.

137778400252 is a deficient number, since it is larger than the sum of its proper divisors (103333800196).

137778400252 is a wasteful number, since it uses less digits than its factorization.

137778400252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34444600067 (or 34444600065 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 46.

The spelling of 137778400252 in words is "one hundred thirty-seven billion, seven hundred seventy-eight million, four hundred thousand, two hundred fifty-two".