61543144324402 has 64 divisors (see below), whose sum is σ = 103064596992000. Its totient is φ = 27369945469440.

The previous prime is 61543144324399. The next prime is 61543144324427. The reversal of 61543144324402 is 20442344134516.

It is a super-2 number, since 2×61543144324402² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2340297318 + ... + 2340323614.

It is an arithmetic number, because the mean of its divisors is an integer number (1610384328000).

Almost surely, 2^{61543144324402} is an apocalyptic number.

61543144324402 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

61543144324402 is a deficient number, since it is larger than the sum of its proper divisors (41521452667598).

61543144324402 is a wasteful number, since it uses less digits than its factorization.

61543144324402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38731.

The product of its (nonzero) digits is 1105920, while the sum is 43.

Adding to 61543144324402 its reverse (20442344134516), we get a palindrome (81985488458918).

The spelling of 61543144324402 in words is "sixty-one trillion, five hundred forty-three billion, one hundred forty-four million, three hundred twenty-four thousand, four hundred two".