1520690831738 has 48 divisors (see below), whose sum is σ = 2503228867776. Its totient is φ = 692438123520.

The previous prime is 1520690831731. The next prime is 1520690831749. The reversal of 1520690831738 is 8371380960251.

It is a self number, because there is not a number n which added to its sum of digits gives 1520690831738.

It is not an unprimeable number, because it can be changed into a prime (1520690831731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20357978 + ... + 20432538.

It is an arithmetic number, because the mean of its divisors is an integer number (52150601412).

Almost surely, 2^{1520690831738} is an apocalyptic number.

1520690831738 is a deficient number, since it is larger than the sum of its proper divisors (982538036038).

1520690831738 is a wasteful number, since it uses less digits than its factorization.

1520690831738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75399 (or 75386 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The spelling of 1520690831738 in words is "one trillion, five hundred twenty billion, six hundred ninety million, eight hundred thirty-one thousand, seven hundred thirty-eight".