148515263640 has 128 divisors (see below), whose sum is σ = 495553996800. Its totient is φ = 39563821440.

The previous prime is 148515263629. The next prime is 148515263647. The reversal of 148515263640 is 46362515841.

148515263640 is a `hidden beast` number, since 1 + 4 + 8 + 5 + 1 + 5 + 2 + 636 + 4 + 0 = 666.

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 (148515263647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1000899 + ... + 1139661.

It is an arithmetic number, because the mean of its divisors is an integer number (3871515600).

Almost surely, 2^148515263640 is an apocalyptic number.

148515263640 is a gapful number since it is divisible by the number (10) 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 148515263640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247776998400).

148515263640 is an abundant number, since it is smaller than the sum of its proper divisors (347038733160).

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

148515263640 is a wasteful number, since it uses less digits than its factorization.

148515263640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139774 (or 139764 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 148515263640 in words is "one hundred forty-eight billion, five hundred fifteen million, two hundred sixty-three thousand, six hundred forty".