1397615401652 has 6 divisors (see below), whose sum is σ = 2445826952898. Its totient is φ = 698807700824.

The previous prime is 1397615401639. The next prime is 1397615401673. The reversal of 1397615401652 is 2561045167931.

It can be written as a sum of positive squares in only one way, i.e., 1231824735376 + 165790666276 = 1109876^2 + 407174^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1397615401652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174701925203 + ... + 174701925210.

It is an arithmetic number, because the mean of its divisors is an integer number (407637825483).

Almost surely, 2^{1397615401652} is an apocalyptic number.

It is an amenable number.

1397615401652 is a deficient number, since it is larger than the sum of its proper divisors (1048211551246).

1397615401652 is a wasteful number, since it uses less digits than its factorization.

1397615401652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349403850417 (or 349403850415 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 1397615401652 in words is "one trillion, three hundred ninety-seven billion, six hundred fifteen million, four hundred one thousand, six hundred fifty-two".