51662221545 has 32 divisors (see below), whose sum is σ = 91409341824. Its totient is φ = 24705216000.

The previous prime is 51662221543. The next prime is 51662221547. The reversal of 51662221545 is 54512226615.

51662221545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51662221543) and next prime (51662221547).

It is not a de Polignac number, because 51662221545 - 2¹ = 51662221543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51662221543) 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, 2132506 + ... + 2156595.

It is an arithmetic number, because the mean of its divisors is an integer number (2856541932).

Almost surely, 2^51662221545 is an apocalyptic number.

51662221545 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51662221545 is a deficient number, since it is larger than the sum of its proper divisors (39747120279).

51662221545 is a wasteful number, since it uses less digits than its factorization.

51662221545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289193.

The product of its digits is 144000, while the sum is 39.

The spelling of 51662221545 in words is "fifty-one billion, six hundred sixty-two million, two hundred twenty-one thousand, five hundred forty-five".