42372379491649 has 9 divisors (see below), whose sum is σ = 43187294490403. Its totient is φ = 41572562144152.

The previous prime is 42372379491523. The next prime is 42372379491707. The reversal of 42372379491649 is 94619497327324.

The square root of 42372379491649 is 6509407.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 30546126191025 + 11826253300624 = 5526855^2 + 3438932^2 .

It is not a de Polignac number, because 42372379491649 - 2¹⁵ = 42372379458881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42372379491349) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 344937162 + ... + 345059980.

Almost surely, 2^{42372379491649} is an apocalyptic number.

42372379491649 is the 6509407-th square number.

42372379491649 is the 3254704-th centered octagonal number.

It is an amenable number.

42372379491649 is a deficient number, since it is larger than the sum of its proper divisors (814914998754).

42372379491649 is an frugal number, since it uses more digits than its factorization.

42372379491649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245744 (or 122872 counting only the distinct ones).

The product of its digits is 493807104, while the sum is 70.

The spelling of 42372379491649 in words is "forty-two trillion, three hundred seventy-two billion, three hundred seventy-nine million, four hundred ninety-one thousand, six hundred forty-nine".