15625450401 has 32 divisors (see below), whose sum is σ = 22890470400. Its totient is φ = 9402415680.

The previous prime is 15625450391. The next prime is 15625450411. The reversal of 15625450401 is 10405452651.

It is an interprime number because it is at equal distance from previous prime (15625450391) and next prime (15625450411).

It is not a de Polignac number, because 15625450401 - 2³¹ = 13477966753 is a prime.

It is a super-2 number, since 2×15625450401² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (15625450411) 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, 4706220 + ... + 4709538.

It is an arithmetic number, because the mean of its divisors is an integer number (715327200).

Almost surely, 2^15625450401 is an apocalyptic number.

15625450401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15625450401 is a deficient number, since it is larger than the sum of its proper divisors (7265019999).

15625450401 is a wasteful number, since it uses less digits than its factorization.

15625450401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4309.

The product of its (nonzero) digits is 24000, while the sum is 33.

The spelling of 15625450401 in words is "fifteen billion, six hundred twenty-five million, four hundred fifty thousand, four hundred one".