642370155642452 has 12 divisors (see below), whose sum is σ = 1130427927528480. Its totient is φ = 319390747777176.

The previous prime is 642370155642431. The next prime is 642370155642463. The reversal of 642370155642452 is 254246551073246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448582510208 + ... + 448582511639.

It is an arithmetic number, because the mean of its divisors is an integer number (94202327294040).

Almost surely, 2^{642370155642452} is an apocalyptic number.

It is an amenable number.

642370155642452 is a deficient number, since it is larger than the sum of its proper divisors (488057771886028).

642370155642452 is a wasteful number, since it uses less digits than its factorization.

642370155642452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897165022030 (or 897165022028 counting only the distinct ones).

The product of its (nonzero) digits is 48384000, while the sum is 56.

The spelling of 642370155642452 in words is "six hundred forty-two trillion, three hundred seventy billion, one hundred fifty-five million, six hundred forty-two thousand, four hundred fifty-two".