15400972723550 has 24 divisors (see below), whose sum is σ = 29633595795000. Its totient is φ = 5947961878880.

The previous prime is 15400972723547. The next prime is 15400972723597. The reversal of 15400972723550 is 5532727900451.

It is a super-2 number, since 2×15400972723550² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5310678800 + ... + 5310681699.

It is an arithmetic number, because the mean of its divisors is an integer number (1234733158125).

Almost surely, 2^{15400972723550} is an apocalyptic number.

15400972723550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15400972723550 is a deficient number, since it is larger than the sum of its proper divisors (14232623071450).

15400972723550 is a wasteful number, since it uses less digits than its factorization.

15400972723550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10621360540 (or 10621360535 counting only the distinct ones).

The product of its (nonzero) digits is 2646000, while the sum is 50.

The spelling of 15400972723550 in words is "fifteen trillion, four hundred billion, nine hundred seventy-two million, seven hundred twenty-three thousand, five hundred fifty".