37218961940 has 12 divisors (see below), whose sum is σ = 78159820116. Its totient is φ = 14887584768.

The previous prime is 37218961921. The next prime is 37218961961. The reversal of 37218961940 is 4916981273.

It can be written as a sum of positive squares in 2 ways, for example, as 28040172304 + 9178789636 = 167452^2 + 95806^2 .

It is a super-2 number, since 2×37218961940² (a number of 22 digits) contains 22 as substring.

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, 930474029 + ... + 930474068.

It is an arithmetic number, because the mean of its divisors is an integer number (6513318343).

Almost surely, 2^37218961940 is an apocalyptic number.

It is an amenable number.

37218961940 is an abundant number, since it is smaller than the sum of its proper divisors (40940858176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

37218961940 is a wasteful number, since it uses less digits than its factorization.

37218961940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860948106 (or 1860948104 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 37218961940 in words is "thirty-seven billion, two hundred eighteen million, nine hundred sixty-one thousand, nine hundred forty".