81476944942 has 16 divisors (see below), whose sum is σ = 124244360352. Its totient is φ = 40062431520.

The previous prime is 81476944933. The next prime is 81476944951. The reversal of 81476944942 is 24944967418.

It is an interprime number because it is at equal distance from previous prime (81476944933) and next prime (81476944951).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553623 + ... + 685165.

It is an arithmetic number, because the mean of its divisors is an integer number (7765272522).

Almost surely, 2^81476944942 is an apocalyptic number.

81476944942 is a deficient number, since it is larger than the sum of its proper divisors (42767415410).

81476944942 is a wasteful number, since it uses less digits than its factorization.

81476944942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136683.

The product of its digits is 13934592, while the sum is 58.

The spelling of 81476944942 in words is "eighty-one billion, four hundred seventy-six million, nine hundred forty-four thousand, nine hundred forty-two".