53661305407402 has 32 divisors (see below), whose sum is σ = 106256763653760. Its totient is φ = 19677178452480.

The previous prime is 53661305407379. The next prime is 53661305407433. The reversal of 53661305407402 is 20470450316635.

It is a happy number.

It is a super-2 number, since 2×53661305407402² (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 15 ways as a sum of consecutive naturals, for example, 10248527827 + ... + 10248533062.

It is an arithmetic number, because the mean of its divisors is an integer number (3320523864180).

Almost surely, 2^{53661305407402} is an apocalyptic number.

53661305407402 is a deficient number, since it is larger than the sum of its proper divisors (52595458246358).

53661305407402 is a wasteful number, since it uses less digits than its factorization.

53661305407402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20497060926.

The product of its (nonzero) digits is 1814400, while the sum is 46.

The spelling of 53661305407402 in words is "fifty-three trillion, six hundred sixty-one billion, three hundred five million, four hundred seven thousand, four hundred two".