1397634970536 has 384 divisors, whose sum is σ = 4580370432000. Its totient is φ = 393687713664.

The previous prime is 1397634970531. The next prime is 1397634970561. The reversal of 1397634970536 is 6350794367931.

1397634970536 is a `hidden beast` number, since 1 + 3 + 9 + 7 + 6 + 3 + 4 + 97 + 0 + 536 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1397634970531) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 219096195 + ... + 219102573.

It is an arithmetic number, because the mean of its divisors is an integer number (11928048000).

Almost surely, 2^{1397634970536} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1397634970536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2290185216000).

1397634970536 is an abundant number, since it is smaller than the sum of its proper divisors (3182735461464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1397634970536 is a wasteful number, since it uses less digits than its factorization.

1397634970536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6698 (or 6681 counting only the distinct ones).

The product of its (nonzero) digits is 77157360, while the sum is 63.

The spelling of 1397634970536 in words is "one trillion, three hundred ninety-seven billion, six hundred thirty-four million, nine hundred seventy thousand, five hundred thirty-six".