1015643138490 has 48 divisors (see below), whose sum is σ = 2653187243616. Its totient is φ = 269554572000.

The previous prime is 1015643138449. The next prime is 1015643138557. The reversal of 1015643138490 is 948313465101.

1015643138490 is a `hidden beast` number, since 1 + 0 + 1 + 56 + 431 + 3 + 84 + 90 = 666.

It is a super-3 number, since 3×1015643138490³ (a number of 37 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26722536 + ... + 26760515.

It is an arithmetic number, because the mean of its divisors is an integer number (55274734242).

Almost surely, 2^{1015643138490} is an apocalyptic number.

1015643138490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1015643138490 is an abundant number, since it is smaller than the sum of its proper divisors (1637544105126).

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

1015643138490 is a wasteful number, since it uses less digits than its factorization.

1015643138490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53483275 (or 53483272 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 1015643138490 in words is "one trillion, fifteen billion, six hundred forty-three million, one hundred thirty-eight thousand, four hundred ninety".