15480739821 has 16 divisors (see below), whose sum is σ = 21086834688. Its totient is φ = 10097708400.

The previous prime is 15480739711. The next prime is 15480739823. The reversal of 15480739821 is 12893708451.

It is not a de Polignac number, because 15480739821 - 2⁷ = 15480739693 is a prime.

It is a super-2 number, since 2×15480739821² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15480739823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 479416 + ... + 510686.

It is an arithmetic number, because the mean of its divisors is an integer number (1317927168).

Almost surely, 2^15480739821 is an apocalyptic number.

It is an amenable number.

15480739821 is a deficient number, since it is larger than the sum of its proper divisors (5606094867).

15480739821 is a wasteful number, since it uses less digits than its factorization.

15480739821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34832.

The product of its (nonzero) digits is 483840, while the sum is 48.

The spelling of 15480739821 in words is "fifteen billion, four hundred eighty million, seven hundred thirty-nine thousand, eight hundred twenty-one".