37221949440 has 560 divisors, whose sum is σ = 143870525568. Its totient is φ = 9151709184.

The previous prime is 37221949417. The next prime is 37221949447. The reversal of 37221949440 is 4494912273.

37221949440 is a `hidden beast` number, since 372 + 2 + 194 + 94 + 4 + 0 = 666.

It is a super-2 number, since 2×37221949440² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37221949447) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 43130449 + ... + 43131311.

Almost surely, 2^37221949440 is an apocalyptic number.

37221949440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 37221949440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71935262784).

37221949440 is an abundant number, since it is smaller than the sum of its proper divisors (106648576128).

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

37221949440 is an equidigital number, since it uses as much as digits as its factorization.

37221949440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 886 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 37221949440 in words is "thirty-seven billion, two hundred twenty-one million, nine hundred forty-nine thousand, four hundred forty".