997540520301 has 72 divisors (see below), whose sum is σ = 1571044020000. Its totient is φ = 609639488640.

The previous prime is 997540520299. The next prime is 997540520321. The reversal of 997540520301 is 103025045799.

It is a happy number.

997540520301 is a `hidden beast` number, since 9 + 97 + 5 + 4 + 0 + 520 + 30 + 1 = 666.

It is not a de Polignac number, because 997540520301 - 2¹ = 997540520299 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997540520321) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 160141455 + ... + 160147683.

Almost surely, 2^997540520301 is an apocalyptic number.

It is an amenable number.

997540520301 is a deficient number, since it is larger than the sum of its proper divisors (573503499699).

997540520301 is a wasteful number, since it uses less digits than its factorization.

997540520301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6971 (or 6955 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 997540520301 in words is "nine hundred ninety-seven billion, five hundred forty million, five hundred twenty thousand, three hundred one".