642370155642435 has 64 divisors (see below), whose sum is σ = 1192051984628736. Its totient is φ = 292289838297600.

The previous prime is 642370155642431. The next prime is 642370155642463. The reversal of 642370155642435 is 534246551073246.

It is not a de Polignac number, because 642370155642435 - 2² = 642370155642431 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642370155642431) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1596662056 + ... + 1597064325.

It is an arithmetic number, because the mean of its divisors is an integer number (18625812259824).

Almost surely, 2^{642370155642435} is an apocalyptic number.

642370155642435 is a deficient number, since it is larger than the sum of its proper divisors (549681828986301).

642370155642435 is a wasteful number, since it uses less digits than its factorization.

642370155642435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3193726476.

The product of its (nonzero) digits is 72576000, while the sum is 57.

The spelling of 642370155642435 in words is "six hundred forty-two trillion, three hundred seventy billion, one hundred fifty-five million, six hundred forty-two thousand, four hundred thirty-five".