90540139078 has 24 divisors (see below), whose sum is σ = 150323038488. Its totient is φ = 40754632512.

The previous prime is 90540139051. The next prime is 90540139091. The reversal of 90540139078 is 87093104509.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2498976 + ... + 2534947.

It is an arithmetic number, because the mean of its divisors is an integer number (6263459937).

Almost surely, 2^90540139078 is an apocalyptic number.

90540139078 is a deficient number, since it is larger than the sum of its proper divisors (59782899410).

90540139078 is a wasteful number, since it uses less digits than its factorization.

90540139078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5033988 (or 5033965 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 90540139078 in words is "ninety billion, five hundred forty million, one hundred thirty-nine thousand, seventy-eight".