615381000000 has 784 divisors, whose sum is σ = 2266920983040. Its totient is φ = 146304000000.

The previous prime is 615380999999. The next prime is 615381000023. The reversal of 615381000000 is 183516.

It is a super-2 number, since 2×615381000000² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 1208999746 + ... + 1209000254.

Almost surely, 2^615381000000 is an apocalyptic number.

615381000000 is a gapful number since it is divisible by the number (60) 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 615381000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1133460491520).

615381000000 is an abundant number, since it is smaller than the sum of its proper divisors (1651539983040).

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

615381000000 is an equidigital number, since it uses as much as digits as its factorization.

615381000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 615381000000 its reverse (183516), we get a palindrome (615381183516).

The spelling of 615381000000 in words is "six hundred fifteen billion, three hundred eighty-one million", and thus it is an aban number.