642370155642393 has 32 divisors (see below), whose sum is σ = 869810726865024. Its totient is φ = 421623999263232.

The previous prime is 642370155642349. The next prime is 642370155642421. The reversal of 642370155642393 is 393246551073246.

It is a happy number.

It is not a de Polignac number, because 642370155642393 - 2¹⁶ = 642370155576857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642370155642323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1702117005 + ... + 1702494357.

It is an arithmetic number, because the mean of its divisors is an integer number (27181585214532).

Almost surely, 2^{642370155642393} is an apocalyptic number.

It is an amenable number.

642370155642393 is a deficient number, since it is larger than the sum of its proper divisors (227440571222631).

642370155642393 is a wasteful number, since it uses less digits than its factorization.

642370155642393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401065.

The product of its (nonzero) digits is 97977600, while the sum is 60.

The spelling of 642370155642393 in words is "six hundred forty-two trillion, three hundred seventy billion, one hundred fifty-five million, six hundred forty-two thousand, three hundred ninety-three".